Zone Forecast Product
Issued by NWS Phoenix, AZ
Issued by NWS Phoenix, AZ
125 FPUS55 KPSR 180731 ZFPPSR Zone Forecast Product for Southwest Arizona/Southeast California National Weather Service Phoenix AZ 1231 AM MST Tue Aug 18 2026 This is an automatically generated product that provides average values for large geographical areas and may not be representative of the exact location that you are interested in. For a more site specific forecast, please visit weather.gov/phoenix and either (1) Select a location from the dropdown menu above the map or (2) Click a location on the map. You can refine your selection by clicking on the map displayed on the resulting page. AZZ537-540-542>544-546-548-550-551-181100- Northwest Valley-Buckeye/Avondale-Deer Valley-Central Phoenix- North Phoenix/Glendale-Scottsdale/Paradise Valley-East Valley- South Mountain/Ahwatukee-Southeast Valley/Queen Creek- Including the cities of Circle City, Surprise, Wittmann, Beardsley, Sun City West, Avondale, Cashion, Goodyear, Liberty, Peoria, Phoenix, Paradise Valley, Mesa, Chandler, Tempe, Gilbert, Sun Lakes, and Queen Creek 1231 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TONIGHT...Clear. Lows 83 to 90. East wind 5 to 10 mph. .TUESDAY...Sunny and hot. Highs 107 to 111. Southeast wind 5 to 10 mph in the morning becoming southwest around 5 mph in the afternoon. .TUESDAY NIGHT...Mostly clear. Lows 83 to 90. Northeast wind around 5 mph in the evening becoming southwest 10 to 15 mph after midnight. .WEDNESDAY...Mostly sunny and hot. Highs 106 to 110. Southwest wind 5 to 10 mph. .WEDNESDAY NIGHT...Partly cloudy. Lows 84 to 91. West wind 5 to 15 mph. .THURSDAY...Mostly sunny and hot. Highs 106 to 111. .THURSDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 82 to 88. .FRIDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 106 to 111. .FRIDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 83 to 90. .SATURDAY...Partly sunny and hot. Highs 106 to 111. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 82 to 89. .SUNDAY...Partly sunny. Highs 105 to 110. .SUNDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 81 to 88. .MONDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 103 to 108. $$ AZZ541-549-555-181100- Cave Creek/New River-Fountain Hills/East Mesa- Apache Junction/Gold Canyon- Including the cities of Scottsdale, Fountain Hills, and Apache Junction 1231 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TONIGHT...Clear. Lows 77 to 87. East wind 5 to 10 mph. .TUESDAY...Sunny and hot. Highs 105 to 110. Southeast wind 5 to 10 mph in the morning becoming southwest around 5 mph in the afternoon. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly clear. Lows 78 to 88. East wind around 5 mph. .WEDNESDAY...Mostly sunny. Highs 104 to 109. South wind around 5 mph in the morning becoming west 5 to 10 mph in the afternoon. .WEDNESDAY NIGHT...Partly cloudy. Lows 77 to 87. West wind 5 to 10 mph in the evening becoming southeast around 5 mph after midnight. .THURSDAY...Mostly sunny. Highs 105 to 109. .THURSDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms in the evening, then a slight chance of showers and thunderstorms after midnight. Lows 79 to 85. Chance of rain 30 percent. .FRIDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 104 to 110. .FRIDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 81 to 86. .SATURDAY...Partly sunny and hot. Highs 104 to 110. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 79 to 85. .SUNDAY...Partly sunny. Highs 103 to 109. .SUNDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 79 to 85. .MONDAY...Partly sunny. Highs 101 to 107. $$ AZZ553-554-181100- Northwest Pinal County-West Pinal County- Including the cities of Casa Grande, Cactus Forest, Florence, and Coolidge 1231 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TONIGHT...Clear. Lows 77 to 87. Southeast wind 5 to 10 mph. .TUESDAY...Sunny and hot. Highs 106 to 111. South wind 5 to 10 mph in the morning becoming northwest around 5 mph in the afternoon. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly clear. Lows 78 to 88. East wind around 5 mph in the evening becoming south 5 to 10 mph after midnight. .WEDNESDAY...Sunny and hot. Highs 105 to 110. Southwest wind around 5 mph in the morning becoming northwest 5 to 10 mph in the afternoon. .WEDNESDAY NIGHT...Partly cloudy. Lows 78 to 88. West wind 5 to 10 mph in the evening becoming south after midnight. .THURSDAY...Partly sunny and hot. Highs 104 to 110. .THURSDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 78 to 86. .FRIDAY...Partly sunny and hot. Highs 105 to 111. .FRIDAY NIGHT...Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows 79 to 87. .SATURDAY...Partly sunny and hot. Highs 105 to 111. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 78 to 86. .SUNDAY...Partly sunny with a 10 percent chance of showers and thunderstorms. Highs 103 to 109. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 78 to 85. .MONDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 102 to 108. $$ AZZ532-181100- Yuma- Including the cities of Yuma and Fortuna Foothills 1231 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TONIGHT...Clear. Lows 85 to 86. South wind 5 to 10 mph. .TUESDAY...Sunny and hot. Highs near 112. South wind 5 to 15 mph. .TUESDAY NIGHT...Partly cloudy. Lows 84 to 86. South wind 5 to 15 mph. .WEDNESDAY...Mostly sunny. Highs near 109. South wind 10 to 20 mph. .WEDNESDAY NIGHT...Clear in the evening then becoming partly cloudy. Lows 84 to 86. South wind 5 to 15 mph. .THURSDAY...Mostly sunny and hot. Highs 109 to 111. .THURSDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms after midnight. Lows in the mid to upper 80s. .FRIDAY...Partly sunny and hot. Highs 110 to 114. .FRIDAY NIGHT...Partly cloudy. Lows in the mid to upper 80s. .SATURDAY...Partly sunny and hot. Highs 110 to 114. .SATURDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows in the mid to upper 80s. .SUNDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 108 to 111. .SUNDAY NIGHT...Mostly clear. Lows in the mid to upper 80s. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 106 to 109. $$ AZZ562-181100- Globe/Miami- Including the cities of Globe and Miami 1231 AM MST Tue Aug 18 2026 .TONIGHT...Clear. Lows 67 to 77. East wind 5 to 10 mph. .TUESDAY...Mostly sunny, otherwise partly cloudy with a slight chance of afternoon showers and thunderstorms. Highs 93 to 103. East wind 5 to 10 mph. Chance of rain 10 percent. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly clear. Lows 68 to 78. North wind around 5 mph. .WEDNESDAY...Mostly sunny. Highs 94 to 104. Southwest wind around 5 mph in the morning becoming west 5 to 10 mph in the afternoon. .WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows 68 to 78. West wind 5 to 10 mph. Chance of rain 10 percent. .THURSDAY...Partly cloudy. A 30 percent chance of afternoon showers and thunderstorms. Highs 99 to 103. .THURSDAY NIGHT...Partly cloudy. A 30 percent chance of showers and thunderstorms in the evening. Lows in the mid 70s. .FRIDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 99 to 103. .FRIDAY NIGHT...Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows in the mid to upper 70s. .SATURDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 98 to 104. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the mid 70s. .SUNDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 97 to 101. .SUNDAY NIGHT...Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows in the mid to upper 70s. .MONDAY...Partly sunny. Highs 96 to 100. $$ AZZ545-547-552-556>558-561-181100- New River Mesa-Rio Verde/Salt River-Superior-Tonto Basin- Mazatzal Mountains-Pinal/Superstition Mountains-Dripping Springs- Including the cities of Tortilla Flat, Superior, Punkin Center, Sunflower, Hayden, and Winkelman 1231 AM MST Tue Aug 18 2026 .TONIGHT...Clear. Lows 75 to 85. East wind 5 to 10 mph. .TUESDAY...Mostly sunny. Highs 104 to 109. Southeast wind 5 to 10 mph in the morning becoming southwest in the afternoon. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly clear. Lows 76 to 86. East wind 5 to 10 mph. .WEDNESDAY...Mostly sunny. Highs 103 to 108. Southwest wind 5 to 10 mph. .WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows 75 to 85. Northwest wind 5 to 10 mph in the evening becoming east around 5 mph after midnight. Chance of rain 10 percent. .THURSDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 92 to 108. .THURSDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms in the evening, then a slight chance of showers and thunderstorms after midnight. Lows 68 to 83. Chance of rain 30 percent. .FRIDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 93 to 109. .FRIDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 69 to 84. .SATURDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 93 to 109. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 69 to 84. .SUNDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 91 to 107. .SUNDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 69 to 83. .MONDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 90 to 106. $$ AZZ560-181100- San Carlos- Including the cities of San Carlos and Peridot 1231 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM THIS MORNING TO 8 PM MST FRIDAY... .TONIGHT...Clear. Lows 69 to 79. Northeast wind around 5 mph. .TUESDAY...Sunny in the morning, then partly sunny with a slight chance of afternoon showers and thunderstorms. Highs 97 to 107. East wind 5 to 10 mph. Chance of rain 10 percent. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly clear. Lows 70 to 80. Northwest wind around 5 mph. .WEDNESDAY...Mostly sunny, otherwise partly cloudy with a slight chance of afternoon showers and thunderstorms. Highs 98 to 108. Southwest wind 5 to 10 mph. Chance of rain 10 percent. .WEDNESDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows 69 to 79. Northwest wind 5 to 10 mph. Chance of rain 20 percent. .THURSDAY...Partly cloudy. A 30 percent chance of afternoon showers and thunderstorms. Highs 102 to 108. .THURSDAY NIGHT...Partly cloudy. A 30 percent chance of showers and thunderstorms in the evening. Lows in the mid to upper 70s. .FRIDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 102 to 108. .FRIDAY NIGHT...Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows in the mid to upper 70s. .SATURDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 101 to 107. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the mid to upper 70s. .SUNDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 100 to 106. .SUNDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows in the mid to upper 70s. .MONDAY...Partly sunny. Highs 99 to 105. $$ AZZ563-181100- Southeast Gila County- 1231 AM MST Tue Aug 18 2026 .TONIGHT...Clear. Lows 68 to 78. East wind 5 to 10 mph. .TUESDAY...Sunny in the morning, then partly sunny with a slight chance of afternoon showers and thunderstorms. Highs 90 to 100. Southeast wind 5 to 10 mph. Chance of rain 20 percent. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly clear. Lows 68 to 78. Northeast wind around 5 mph. .WEDNESDAY...Mostly sunny in the morning, then partly sunny with a slight chance of afternoon showers and thunderstorms. Highs 91 to 101. West wind 5 to 10 mph. Chance of rain 10 percent. .WEDNESDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows 68 to 78. North wind around 5 mph. Chance of rain 10 percent. .THURSDAY...Partly cloudy. A 50 percent chance of afternoon showers and thunderstorms. Highs 89 to 101. Rainfall less than a tenth of an inch, except locally higher in thunderstorms. .THURSDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 59 to 76. .FRIDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 89 to 101. .FRIDAY NIGHT...Partly cloudy. A 30 percent chance of showers and thunderstorms in the evening. Lows 59 to 77. .SATURDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 89 to 101. .SATURDAY NIGHT...Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows 59 to 77. .SUNDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 88 to 100. .SUNDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 59 to 77. .MONDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 87 to 99. $$ AZZ539-559-181100- Gila Bend-Sonoran Desert Natl Monument- Including the cities of Gila Bend, Sentinel, and Kaka 1231 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TONIGHT...Clear. Lows 79 to 89. South wind 5 to 10 mph. .TUESDAY...Sunny and hot. Highs 108 to 113. Southwest wind 5 to 10 mph in the morning becoming northwest around 5 mph in the afternoon. .TUESDAY NIGHT...Mostly clear in the evening then becoming partly cloudy. Lows 79 to 89. Southwest wind 5 to 15 mph. .WEDNESDAY...Sunny and hot. Highs 107 to 112. Southwest wind 5 to 10 mph in the morning becoming west in the afternoon. .WEDNESDAY NIGHT...Partly cloudy. Lows 78 to 88. Southwest wind 5 to 10 mph. .THURSDAY...Mostly sunny. Hot. Highs 104 to 112. Chance of precipitation 10 percent. .THURSDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 80 to 88. .FRIDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 104 to 112. .FRIDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 81 to 89. .SATURDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 103 to 113. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 80 to 88. .SUNDAY...Partly sunny. A slight chance of showers in the morning, then a slight chance of afternoon showers and thunderstorms. Hot. Highs 103 to 111. Chance of rain 10 percent. .SUNDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 79 to 87. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 101 to 109. $$ AZZ534-538-181100- Aguila Valley-Tonopah Desert- Including the cities of Aguila, Gladden, Wickenburg, Arlington, Hassayampa, Tonopah, and Wintersburg 1231 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TONIGHT...Clear. Lows 77 to 87. North wind around 5 mph. .TUESDAY...Sunny and hot. Highs 108 to 113. Southeast wind 5 to 10 mph in the morning becoming southwest in the afternoon. .TUESDAY NIGHT...Mostly clear in the evening then becoming partly cloudy. Lows 78 to 88. West wind 5 to 10 mph in the evening becoming southwest 10 to 15 mph after midnight. .WEDNESDAY...Mostly sunny and hot. Highs 107 to 112. South wind 5 to 10 mph in the morning becoming southwest in the afternoon. .WEDNESDAY NIGHT...Partly cloudy. Lows 78 to 88. West wind 5 to 10 mph. .THURSDAY...Mostly sunny and hot. Highs 104 to 112. .THURSDAY NIGHT...Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows 79 to 87. .FRIDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 104 to 112. .FRIDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 79 to 88. .SATURDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 103 to 111. .SATURDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 79 to 87. .SUNDAY...Partly sunny with a 10 percent chance of showers and thunderstorms. Hot. Highs 102 to 110. .SUNDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 78 to 86. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 100 to 108. $$ AZZ531-533-181100- Kofa-Central La Paz- Including the cities of Palm Canyon, Brenda, Harcuvar, Quartzsite, Vicksburg, Vicksburg Junction, and Salome 1231 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TONIGHT...Clear. Lows 78 to 88. Southwest wind around 5 mph. .TUESDAY...Sunny and hot. Highs 108 to 113. South wind 5 to 10 mph. .TUESDAY NIGHT...Partly cloudy. Lows 77 to 87. Southwest wind 5 to 10 mph. .WEDNESDAY...Mostly sunny and hot. Highs 106 to 111. South wind 5 to 10 mph. .WEDNESDAY NIGHT...Mostly clear in the evening then becoming partly cloudy. Lows 78 to 88. South wind 5 to 10 mph. .THURSDAY...Mostly sunny and hot. Highs 103 to 111. .THURSDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 80 to 88. .FRIDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 103 to 111. .FRIDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 80 to 88. .SATURDAY...Partly cloudy. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 103 to 111. .SATURDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 79 to 87. .SUNDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 102 to 110. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 78 to 86. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 100 to 108. $$ AZZ535-536-181100- Southeast Yuma County-Gila River Valley- Including the city of Ligurta 1231 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TONIGHT...Clear. Lows 79 to 89. South wind 5 to 10 mph. .TUESDAY...Sunny and hot. Highs 108 to 113. South wind 5 to 15 mph. .TUESDAY NIGHT...Partly cloudy. Lows 77 to 87. Southwest wind 5 to 15 mph. .WEDNESDAY...Mostly sunny and hot. Highs 106 to 111. South wind 5 to 15 mph. .WEDNESDAY NIGHT...Mostly clear in the evening then becoming partly cloudy. Lows 77 to 87. South wind 5 to 10 mph. .THURSDAY...Mostly sunny and hot. Highs 106 to 112. .THURSDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 83 to 88. .FRIDAY...Partly sunny and hot. Highs 109 to 113. .FRIDAY NIGHT...Clear with a 10 percent chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows 84 to 89. .SATURDAY...Partly cloudy in the morning then becoming mostly sunny. Hot. Highs 109 to 113. .SATURDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 83 to 88. .SUNDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 106 to 110. .SUNDAY NIGHT...Partly cloudy. Lows 81 to 86. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 104 to 108. $$ AZZ530-CAZ569-181100- Parker Valley-Palo Verde Valley- Including the cities of Parker, Ehrenberg, Martinez Lake, Blythe, Palo Verde, and Ripley 1231 AM MST Tue Aug 18 2026 /1231 AM PDT Tue Aug 18 2026/ ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST /8 PM PDT/ FRIDAY... .TONIGHT...Clear. Lows 78 to 88. Southwest wind around 5 mph. .TUESDAY...Mostly sunny and hot. Highs 109 to 114. South wind 5 to 10 mph. .TUESDAY NIGHT...Partly cloudy. Lows 78 to 88. South wind 5 to 10 mph. .WEDNESDAY...Mostly sunny and hot. Highs 107 to 112. South wind 10 to 15 mph. .WEDNESDAY NIGHT...Mostly clear. Lows 78 to 88. South wind 5 to 15 mph. .THURSDAY...Mostly sunny and hot. Highs 106 to 112. .THURSDAY NIGHT...Partly cloudy. Lows 82 to 88. .FRIDAY...Partly sunny and hot. Highs 107 to 113. .FRIDAY NIGHT...Partly cloudy. Lows 83 to 89. .SATURDAY...Partly sunny and hot. Highs 107 to 113. .SATURDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 82 to 88. .SUNDAY...Partly sunny and hot. Highs 106 to 112. .SUNDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 81 to 87. .MONDAY...Mostly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 104 to 110. $$ CAZ565-570-181100- Imperial County Southeast-Chuckwalla Valley- Including the cities of Winterhaven and Midland 1231 AM PDT Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT FRIDAY... .TONIGHT...Clear. Lows 80 to 90. Northwest wind 5 to 10 mph. .TUESDAY...Mostly sunny and hot. Highs 109 to 114. South wind 5 to 10 mph. .TUESDAY NIGHT...Partly cloudy. Lows 79 to 89. South wind 5 to 10 mph. .WEDNESDAY...Partly sunny in the morning then becoming sunny. Hot. Highs 107 to 112. South wind 5 to 15 mph. .WEDNESDAY NIGHT...Mostly clear. Lows 79 to 89. South wind 5 to 15 mph. .THURSDAY...Mostly sunny and hot. Highs 104 to 112. .THURSDAY NIGHT...Partly cloudy. Lows 82 to 90. .FRIDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 105 to 113. .FRIDAY NIGHT...Partly cloudy. Lows 82 to 90. .SATURDAY...Partly sunny and hot. Highs 105 to 113. .SATURDAY NIGHT...Partly cloudy. Lows 83 to 90. .SUNDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 104 to 111. .SUNDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 82 to 89. .MONDAY...Mostly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 102 to 109. $$ CAZ564-568-181100- Chuckwalla Mountains-Chiriaco Summit- Including the cities of Imperial Hot Mineral Springs and Chiriaco Summit 1231 AM PDT Tue Aug 18 2026 .TONIGHT...Clear. Lows 78 to 88. Northwest wind 5 to 10 mph. .TUESDAY...Mostly sunny in the morning then becoming partly sunny. Hot. Highs 106 to 111. South wind 5 to 10 mph. .TUESDAY NIGHT...Partly cloudy. Lows 77 to 87. Southwest wind 5 to 10 mph. .WEDNESDAY...Partly sunny in the morning then becoming sunny. Highs 104 to 109. South wind 5 to 10 mph. .WEDNESDAY NIGHT...Mostly clear. Lows 76 to 86. South wind 5 to 10 mph. .THURSDAY...Mostly sunny. Highs 99 to 109. .THURSDAY NIGHT...Partly cloudy. Lows 78 to 87. .FRIDAY...Partly sunny. Highs 99 to 109. .FRIDAY NIGHT...Partly cloudy. Lows 79 to 88. .SATURDAY...Partly sunny and hot. Highs 98 to 110. .SATURDAY NIGHT...Partly cloudy. Lows 78 to 87. .SUNDAY...Mostly sunny. A 10 percent chance of showers in the morning. Highs 98 to 108. .SUNDAY NIGHT...Partly cloudy. Lows 77 to 87. .MONDAY...Mostly sunny, otherwise partly cloudy with a slight chance of showers in the morning, then a slight chance of afternoon showers and thunderstorms. Highs 96 to 106. Chance of rain 10 percent. $$ CAZ563-181100- Salton Sea- Including the city of Desert Shores 1231 AM PDT Tue Aug 18 2026 .TONIGHT...Clear. Lows 81 to 91. Northwest wind 5 to 15 mph. .TUESDAY...Mostly sunny in the morning then becoming partly sunny. Hot. Highs 107 to 112. Southeast wind 10 to 15 mph in the morning decreasing to around 5 mph in the afternoon. .TUESDAY NIGHT...Partly cloudy. Lows 80 to 90. West wind 5 to 10 mph in the evening becoming southeast after midnight. .WEDNESDAY...Mostly sunny and hot. Highs 105 to 110. Southeast wind 10 to 15 mph in the morning becoming south around 5 mph in the afternoon. .WEDNESDAY NIGHT...Clear. Lows 81 to 91. East wind 5 to 15 mph. .THURSDAY...Sunny and hot. Highs 102 to 110. .THURSDAY NIGHT...Partly cloudy. Lows 86 to 91. .FRIDAY...Partly sunny. Highs 101 to 109. .FRIDAY NIGHT...Mostly clear. Lows 87 to 92. .SATURDAY...Partly sunny and hot. Highs 102 to 110. .SATURDAY NIGHT...Partly cloudy. Lows 86 to 91. .SUNDAY...Partly sunny. A slight chance of showers in the morning, then a slight chance of afternoon showers and thunderstorms. Hot. Highs 100 to 110. Chance of rain 20 percent. .SUNDAY NIGHT...Mostly clear. Lows in the mid to upper 80s. .MONDAY...Mostly sunny. Highs 99 to 107. $$ CAZ567-181100- Imperial Valley- Including the cities of El Centro, Calexico, Alamorio, and Brawley 1231 AM PDT Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT FRIDAY... .TONIGHT...Clear. Lows 77 to 87. Northwest wind 5 to 10 mph. .TUESDAY...Sunny in the morning then becoming partly sunny. Hot. Highs 109 to 114. Southeast wind around 5 mph. .TUESDAY NIGHT...Partly cloudy. Lows 76 to 86. South wind around 5 mph. .WEDNESDAY...Partly sunny in the morning then becoming mostly sunny. Hot. Highs 108 to 113. Southeast wind 5 to 10 mph. .WEDNESDAY NIGHT...Mostly clear. Lows 77 to 87. Southeast wind 5 to 10 mph. .THURSDAY...Mostly sunny and hot. Highs 109 to 113. .THURSDAY NIGHT...Partly cloudy. Lows in the mid to upper 80s. .FRIDAY...Partly sunny and hot. Highs 109 to 113. .FRIDAY NIGHT...Partly cloudy. Lows in the mid to upper 80s. .SATURDAY...Partly sunny and hot. Highs 109 to 113. .SATURDAY NIGHT...Partly cloudy. Lows in the mid to upper 80s. .SUNDAY...Partly sunny with a slight chance of showers in the morning, then sunny with a slight chance of afternoon showers and thunderstorms. Hot. Highs 108 to 112. Chance of rain 20 percent. .SUNDAY NIGHT...Partly cloudy. Lows in the lower to mid 80s. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Hot. Highs 106 to 110. $$ CAZ566-181100- Imperial County West- Including the cities of Coolidge Springs, Salton City, Winona, Coyote Wells, Ocotillo, and Plaster City 1231 AM PDT Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT FRIDAY... .TONIGHT...Clear. Lows 80 to 90. West wind 5 to 10 mph. .TUESDAY...Mostly sunny in the morning then becoming partly sunny. Very hot. Highs 110 to 115. Southeast wind 5 to 10 mph. .TUESDAY NIGHT...Partly cloudy. Lows 80 to 90. Southwest wind 5 to 10 mph. .WEDNESDAY...Partly sunny in the morning then becoming mostly sunny. Hot. Highs 109 to 114. East wind 5 to 10 mph. .WEDNESDAY NIGHT...Clear. Lows 80 to 90. South wind 5 to 10 mph in the evening becoming west around 5 mph after midnight. .THURSDAY...Sunny and hot. Highs 109 to 113. .THURSDAY NIGHT...Partly cloudy. Lows 85 to 90. .FRIDAY...Mostly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 109 to 113. .FRIDAY NIGHT...Partly cloudy. Lows 85 to 90. .SATURDAY...Mostly sunny and hot. Highs 109 to 113. .SATURDAY NIGHT...Partly cloudy. Lows 84 to 89. .SUNDAY...Partly sunny. A slight chance of showers in the morning, then a slight chance of afternoon showers and thunderstorms. Hot. Highs 108 to 112. Chance of rain 20 percent. .SUNDAY NIGHT...Mostly clear. Lows 83 to 88. .MONDAY...Mostly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 107 to 111. $$ CAZ562-181100- Imperial County Southwest- Including the city of Mountain Spring 1231 AM PDT Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT FRIDAY... .TONIGHT...Clear and breezy. Lows 82 to 92. Southwest wind 10 to 20 mph. Gusts up to 30 mph. .TUESDAY...Mostly sunny in the morning then becoming partly sunny. Hot. Highs 109 to 114. Southeast wind 5 to 15 mph. .TUESDAY NIGHT...Partly cloudy. Lows 82 to 92. Southwest wind 10 to 15 mph. .WEDNESDAY...Mostly sunny and hot. Highs 108 to 113. East wind 5 to 10 mph. .WEDNESDAY NIGHT...Clear. Lows 83 to 93. Southwest wind 5 to 15 mph. .THURSDAY...Sunny and hot. Highs 102 to 112. .THURSDAY NIGHT...Partly cloudy. Lows 82 to 92. .FRIDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 102 to 112. .FRIDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 81 to 92. .SATURDAY...Mostly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 102 to 112. .SATURDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 81 to 91. .SUNDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Hot. Highs 101 to 111. .SUNDAY NIGHT...Mostly clear. A 10 percent chance of showers and thunderstorms in the evening. Lows 80 to 90. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Hot. Highs 100 to 110. $$ CAZ560-561-181100- Joshua Tree NP West-Joshua Tree NP East- Including the cities of Cottonwood Visitor and Lost Horse-Keys Village 1231 AM PDT Tue Aug 18 2026 .TONIGHT...Clear. Lows 75 to 85. West wind 5 to 10 mph. .TUESDAY...Mostly sunny in the morning then becoming partly sunny. Highs 99 to 109. Southwest wind 5 to 10 mph. .TUESDAY NIGHT...Partly cloudy. Lows 76 to 86. West wind 5 to 10 mph. .WEDNESDAY...Partly sunny. Highs 98 to 108. South wind 5 to 10 mph. .WEDNESDAY NIGHT...Mostly clear. Lows 76 to 86. Southwest wind 5 to 15 mph. .THURSDAY...Mostly sunny. Highs 91 to 107. .THURSDAY NIGHT...Partly cloudy. Lows 71 to 86. .FRIDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 91 to 107. .FRIDAY NIGHT...Partly cloudy. Lows 70 to 86. .SATURDAY...Partly sunny. Highs 91 to 107. .SATURDAY NIGHT...Partly cloudy. Lows 69 to 86. .SUNDAY...Mostly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 90 to 106. .SUNDAY NIGHT...Mostly clear. Lows 68 to 85. .MONDAY...Mostly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 89 to 105. $$ Visit us on Facebook, Twitter, and at weather.gov/phoenix