956
FPUS55 KBOI 191003
ZFPBOI

Zone Forecasts for Southwest Idaho/Southeast Oregon
National Weather Service Boise ID
402 AM MDT Wed Aug 19 2026

Forecast Updated.

Spot temperatures are for today, tonight, and Thursday.


IDZ011-191800-
West Central Mountains-
402 AM MDT Wed Aug 19 2026

.REST OF TODAY...Patchy smoke early this morning. Mostly clear.
Highs 78 to 92.
.TONIGHT...Mostly clear. Lows 50 to 61.
.THURSDAY...Sunny. Highs 83 to 96.
.THURSDAY NIGHT...Partly cloudy. Lows 53 to 65.
.FRIDAY...Mostly sunny. Highs 86 to 99.
.FRIDAY NIGHT...Mostly cloudy. A chance of showers with a slight
chance of thunderstorms in the evening. Thunderstorms may produce
gusty winds in the evening. Chance of rain 30 percent. Lows 54 to
66.
.SATURDAY...Partly cloudy with a chance of showers with a slight
chance of thunderstorms. Chance of rain 30 percent. Not as warm
with highs 77 to 90.
.SATURDAY NIGHT...Partly cloudy. A slight chance of rain showers
and thunderstorms in the evening. Areas of fog after midnight.
Chance of rain 20 percent. Lows 49 to 60.
.SUNDAY...Areas of fog in the morning. Sunny. Highs 72 to 85.
.SUNDAY NIGHT AND MONDAY...Mostly clear. Lows 47 to 57. Highs
76 to 89.
.MONDAY NIGHT...Partly cloudy. Lows 50 to 61.
.TUESDAY...Partly cloudy. A chance of showers with a slight
chance of thunderstorms in the afternoon. Chance of rain
30 percent. Highs 74 to 88.

&&
               TEMPERATURE
McCall          86  48  91

$$
=

IDZ013-191800-
Boise Mountains-
402 AM MDT Wed Aug 19 2026

.REST OF TODAY...Mostly clear. Highs 81 to 96.
.TONIGHT...Mostly clear. Lows 49 to 64.
.THURSDAY...Sunny. Highs 86 to 100.
.THURSDAY NIGHT...Partly cloudy. Lows 52 to 67.
.FRIDAY...Mostly sunny. Highs 88 to 102.
.FRIDAY NIGHT...Mostly cloudy with a chance of showers. A slight
chance of thunderstorms. Thunderstorms may produce gusty winds in
the evening. Chance of rain 30 percent. Lows 51 to 66.
.SATURDAY...Partly cloudy with a slight chance of thunderstorms.
A chance of showers, mainly in the afternoon. Chance of rain
30 percent. Not as warm with highs 77 to 92.
.SATURDAY NIGHT...A slight chance of thunderstorms in the
evening. Partly cloudy with a slight chance of rain showers.
Chance of rain 20 percent. Lows 45 to 60.
.SUNDAY AND SUNDAY NIGHT...Partly cloudy. Highs 74 to 89. Lows
44 to 59.
.MONDAY...Partly cloudy. A slight chance of rain showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
78 to 93.
.MONDAY NIGHT...Partly cloudy. Lows 46 to 61.
.TUESDAY...Partly cloudy. A chance of rain showers with a slight
chance of thunderstorms in the afternoon. Chance of rain
30 percent. Highs 76 to 91.

&&
               TEMPERATURE
Idaho City      95  50  99

$$
=

IDZ028-191800-
Camas Prairie-
402 AM MDT Wed Aug 19 2026

.REST OF TODAY...Mostly clear. Highs 88 to 93. West winds 10 to
15 mph.
.TONIGHT...Mostly clear. Lows 49 to 57. Northwest winds 10 to
15 mph.
.THURSDAY...Sunny. Highs 92 to 97. Northeast winds around 10 mph
in the morning, shifting to south with gusts to 25 mph in the
afternoon.
.THURSDAY NIGHT...Partly cloudy. Lows 53 to 59. Northwest winds
10 to 15 mph with gusts to 25 mph.
.FRIDAY...Mostly sunny. Highs 94 to 99. Northeast winds around
10 mph in the morning, shifting to southeast in the afternoon.
.FRIDAY NIGHT...Mostly cloudy with a chance of showers. A slight
chance of thunderstorms. Thunderstorms may produce gusty winds in
the evening. Chance of rain 30 percent. Lows 57 to 62.
.SATURDAY AND SATURDAY NIGHT...Decreasing clouds. A slight chance
of showers and thunderstorms. Chance of rain 20 percent. Not as
warm. Highs 84 to 89. Lows 51 to 56.
.SUNDAY AND SUNDAY NIGHT...Partly cloudy. Highs 82 to 87. Lows
48 to 53.
.MONDAY AND MONDAY NIGHT...Partly cloudy. A 20 percent chance of
showers. Highs 82 to 87. Lows 50 to 55.
.TUESDAY...Mostly sunny. Highs 82 to 87.

&&
               TEMPERATURE
Fairfield       91  49  95

$$
=

IDZ033-191800-
Upper Weiser River-
402 AM MDT Wed Aug 19 2026

...HEAT ADVISORY IN EFFECT FROM NOON THURSDAY TO 9 PM MDT
FRIDAY...

.REST OF TODAY...Patchy smoke early this morning. Mostly clear.
Highs 90 to 96. Northeast winds up to 10 mph early this morning,
shifting to southwest this afternoon.
.TONIGHT...Mostly clear. Lows 62 to 68. North winds 10 to 15 mph.
.THURSDAY...Sunny. Highs 94 to 100. Northeast winds around 10 mph
in the morning, shifting to southwest in the afternoon. Gusts to
20 mph.
.THURSDAY NIGHT...Increasing clouds. Lows 63 to 69. South winds
around 10 mph in the evening, shifting to northeast after
midnight.
.FRIDAY...Partly sunny. Highs 96 to 102. Northeast winds up to
10 mph in the morning, shifting to southwest around 10 mph in the
afternoon.
.FRIDAY NIGHT...Mostly cloudy. Lows 67 to 72.
.SATURDAY...Mostly sunny. Highs 89 to 95.
.SATURDAY NIGHT...Partly cloudy. A slight chance of showers in
the evening. Chance of rain 20 percent. Lows 59 to 64.
.SUNDAY AND SUNDAY NIGHT...Mostly clear. Highs 84 to 89. Lows
57 to 63.
.MONDAY THROUGH TUESDAY...Partly cloudy. Highs 87 to 93. Lows
61 to 66.

&&
               TEMPERATURE
Council         96  64  99
Cambridge       96  62  99

$$
=

ORZ064-191800-
Oregon Lower Treasure Valley-
402 AM MDT Wed Aug 19 2026 /302 AM PDT Wed Aug 19 2026/

...HEAT ADVISORY IN EFFECT FROM NOON MDT /11 AM PDT/ THURSDAY TO
9 PM MDT /8 PM PDT/ FRIDAY...

.REST OF TODAY...Mostly clear. Highs 93 to 98. Northwest winds up
to 10 mph early this morning, becoming light this afternoon.
.TONIGHT...Mostly clear. Patchy smoke after midnight. Lows 60 to
68. Light winds in the evening, becoming northwest around 10 mph
after midnight.
.THURSDAY...Patchy smoke in the morning. Sunny. Highs 98 to 103.
Northwest winds up to 10 mph in the morning, shifting to south in
the afternoon.
.THURSDAY NIGHT...Increasing clouds. Lows 64 to 70. Northwest
winds 10 to 15 mph.
.FRIDAY...Partly sunny. Highs 99 to 104. Northwest winds up to
10 mph in the morning, shifting to east in the afternoon.
.FRIDAY NIGHT...Mostly cloudy. Lows 67 to 72.
.SATURDAY...Mostly sunny. Highs 93 to 98.
.SATURDAY NIGHT THROUGH SUNDAY NIGHT...Mostly clear. Lows 59 to
67. Highs 88 to 93.
.MONDAY THROUGH TUESDAY...Partly cloudy. Highs 90 to 96. Lows
62 to 68.

&&
               TEMPERATURE
Ontario         96  60 100

$$
=

IDZ012-191800-
Lower Treasure Valley-
402 AM MDT Wed Aug 19 2026

...HEAT ADVISORY IN EFFECT FROM NOON THURSDAY TO 9 PM MDT
FRIDAY...

.REST OF TODAY...Patchy smoke early this morning. Mostly clear.
Highs 93 to 98. Northwest winds up to 10 mph.
.TONIGHT...Mostly clear. Lows 59 to 66. North winds up to 10 mph.
.THURSDAY...Patchy smoke in the morning. Sunny. Highs 97 to 102.
Light winds in the morning, becoming west around 10 mph in the
afternoon.
.THURSDAY NIGHT...Increasing clouds. Lows 63 to 68. North winds
around 10 mph.
.FRIDAY...Partly sunny. Highs 98 to 103. West winds up to 10 mph.
.FRIDAY NIGHT...Mostly cloudy. Lows 66 to 71.
.SATURDAY...Mostly sunny. Highs 92 to 97.
.SATURDAY NIGHT...Partly cloudy. A slight chance of showers in
the evening. Chance of rain 20 percent. Lows 60 to 65.
.SUNDAY AND SUNDAY NIGHT...Mostly clear. Highs 87 to 92. Lows
58 to 63.
.MONDAY THROUGH TUESDAY...Partly cloudy. Highs 90 to 95. Lows
60 to 65.

&&
               TEMPERATURE
Caldwell        96  59  99

$$
=

IDZ014-191800-
Upper Treasure Valley-
402 AM MDT Wed Aug 19 2026

...HEAT ADVISORY IN EFFECT FROM NOON THURSDAY TO 9 PM MDT
FRIDAY...

.REST OF TODAY...Mostly clear. Highs 94 to 99. Northwest winds up
to 10 mph.
.TONIGHT...Mostly clear. Lows 59 to 65. North winds around 10 mph
in the evening, shifting to east up to 10 mph after midnight.
.THURSDAY...Mostly sunny. Highs 99 to 104. Southeast winds around
10 mph in the morning, shifting to northwest in the afternoon.
Gusts to 20 mph.
.THURSDAY NIGHT...Partly cloudy. Lows 62 to 68. North winds 10 to
15 mph in the evening, shifting to east after midnight.
.FRIDAY...Mostly sunny. Highs 100 to 105. Southeast winds up to
10 mph.
.FRIDAY NIGHT...Mostly cloudy. A chance of showers with a slight
chance of thunderstorms in the evening, then a slight chance of
showers and thunderstorms after midnight. Thunderstorms may
produce gusty winds in the evening. Chance of rain 30 percent.
Lows 66 to 71. Breezy.
.SATURDAY...Mostly sunny. Highs 93 to 98.
.SATURDAY NIGHT...Partly cloudy. A slight chance of showers in
the evening. Chance of rain 20 percent. Lows 60 to 65.
.SUNDAY THROUGH TUESDAY...Partly cloudy. Highs 87 to 96. Lows
57 to 65.

&&
               TEMPERATURE
Boise           96  65 100
Mountain Home   98  61 102

$$
=

IDZ016-191800-
Western Magic Valley-
402 AM MDT Wed Aug 19 2026

...HEAT ADVISORY IN EFFECT FROM NOON THURSDAY TO 9 PM MDT
FRIDAY...

.REST OF TODAY...Mostly clear. Highs 91 to 96. Southeast winds up
to 10 mph early this morning, shifting to northwest this
afternoon.
.TONIGHT...Mostly clear. Lows 60 to 65. Northwest winds around
10 mph in the evening, shifting to southeast after midnight.
.THURSDAY...Sunny. Highs 96 to 101. East winds 10 to 15 mph in
the morning, shifting to north in the afternoon.
.THURSDAY NIGHT...Partly cloudy. Lows 63 to 68. Northwest winds
10 to 15 mph in the evening, shifting to southeast after
midnight.
.FRIDAY...Mostly sunny. Highs 98 to 103. East winds around
10 mph.
.FRIDAY NIGHT...Mostly cloudy with a chance of showers. A slight
chance of thunderstorms. Thunderstorms may produce gusty winds in
the evening. Chance of rain 40 percent. Lows 66 to 71. Breezy.
.SATURDAY...Decreasing clouds. A chance of showers with a slight
chance of thunderstorms in the afternoon. Chance of rain
30 percent. Not as hot with highs 88 to 93.
.SATURDAY NIGHT...Partly cloudy in the evening, then mostly
cloudy with a slight chance of showers after midnight. Chance of
rain 20 percent. Lows 61 to 66.
.SUNDAY...Partly cloudy. A slight chance of showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
84 to 89.
.SUNDAY NIGHT...Partly cloudy. Lows 58 to 63.
.MONDAY...Partly cloudy. A slight chance of showers in the
morning, then a chance of showers with a slight chance of
thunderstorms in the afternoon. Chance of rain 30 percent. Highs
86 to 91.
.MONDAY NIGHT...Mostly cloudy. A chance of showers with a slight
chance of thunderstorms in the evening, then a slight chance of
showers after midnight. Chance of rain 30 percent. Lows 59 to 64.
.TUESDAY...Partly cloudy with a slight chance of showers. A
slight chance of thunderstorms in the afternoon. Chance of rain
20 percent. Highs 86 to 91.

&&
               TEMPERATURE
Jerome          91  64  96
Twin Falls      91  64  97

$$
=

IDZ029-191800-
Owyhee Mountains-
402 AM MDT Wed Aug 19 2026

.REST OF TODAY...Patchy smoke early this morning. Mostly clear.
Highs 85 to 95.
.TONIGHT...Mostly clear. Lows 60 to 68.
.THURSDAY...Mostly sunny. Highs 91 to 97.
.THURSDAY NIGHT...Partly cloudy. Lows 60 to 69.
.FRIDAY...Mostly sunny. Highs 92 to 98.
.FRIDAY NIGHT AND SATURDAY...Mostly cloudy. Lows 62 to 70. Highs
86 to 92.
.SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows 55 to
64. Highs 80 to 87.
.MONDAY AND MONDAY NIGHT...Partly cloudy. A 20 percent chance of
showers. Highs 83 to 90. Lows 58 to 65.
.TUESDAY...Partly sunny in the morning, then clearing. Highs
83 to 89.

$$
=

IDZ015-191800-
Southwest Highlands-
402 AM MDT Wed Aug 19 2026

.REST OF TODAY...Partly cloudy. Highs 90 to 95.
.TONIGHT...Mostly clear. Lows 59 to 65. Breezy.
.THURSDAY...Mostly sunny. Highs 94 to 100.
.THURSDAY NIGHT...Partly cloudy. Lows 61 to 66.
.FRIDAY...Mostly sunny. Highs 95 to 100.
.FRIDAY NIGHT...Mostly cloudy. A chance of showers with a slight
chance of thunderstorms in the evening. Thunderstorms may produce
gusty winds in the evening. Chance of rain 30 percent. Lows 63 to
69. Breezy.
.SATURDAY...Partly cloudy. A slight chance of showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
88 to 93. Breezy.
.SATURDAY NIGHT...Partly cloudy. Lows 58 to 63. Breezy.
.SUNDAY...Partly cloudy. A slight chance of showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
84 to 89.
.SUNDAY NIGHT...Partly cloudy. Lows 56 to 61.
.MONDAY...Partly cloudy. A chance of showers with a slight chance
of thunderstorms in the afternoon. Chance of rain 30 percent.
Highs 85 to 91.
.MONDAY NIGHT...Mostly cloudy with a slight chance of showers in
the evening, then partly cloudy after midnight. Chance of rain
20 percent. Lows 57 to 62.
.TUESDAY...Partly cloudy. A slight chance of showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
85 to 91.

$$
=

IDZ030-191800-
Southern Twin  Falls County-
402 AM MDT Wed Aug 19 2026

.REST OF TODAY...Partly cloudy. Highs 90 to 95.
.TONIGHT...Mostly clear. Lows 61 to 67.
.THURSDAY...Partly cloudy. A slight chance of showers and
thunderstorms in the afternoon. Thunderstorms may produce gusty
winds in the afternoon. Chance of rain 20 percent. Highs 95 to
100. Breezy.
.THURSDAY NIGHT...Partly cloudy. A slight chance of showers and
thunderstorms in the evening. Thunderstorms may produce gusty
winds in the evening. Chance of rain 20 percent. Lows 64 to 69.
.FRIDAY...Mostly sunny. Highs 96 to 101.
.FRIDAY NIGHT...Increasing clouds. A chance of showers with a
slight chance of thunderstorms in the evening, then a slight
chance of showers and thunderstorms after midnight. Thunderstorms
may produce gusty winds in the evening. Chance of rain
40 percent. Lows 65 to 70. Breezy.
.SATURDAY...Partly cloudy. A chance of showers with a slight
chance of thunderstorms in the afternoon. Chance of rain
40 percent. Highs 87 to 92.
.SATURDAY NIGHT...Mostly cloudy. A chance of showers with a
slight chance of thunderstorms in the evening, then a slight
chance of showers after midnight. Chance of rain 30 percent. Lows
61 to 66.
.SUNDAY...Partly cloudy. A chance of showers and thunderstorms in
the afternoon. Chance of rain 30 percent. Highs 83 to 88.
.SUNDAY NIGHT...Partly cloudy. A slight chance of showers and
thunderstorms in the evening. Chance of rain 20 percent. Lows
59 to 64.
.MONDAY...Partly cloudy. A slight chance of showers in the
morning, then a chance of showers with a slight chance of
thunderstorms in the afternoon. Chance of rain 40 percent. Highs
85 to 90.
.MONDAY NIGHT...Mostly cloudy. A chance of showers with a slight
chance of thunderstorms in the evening. Chance of rain
30 percent. Lows 59 to 64.
.TUESDAY...Partly cloudy. A slight chance of showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
85 to 90.

$$
=

ORZ062-191800-
Baker County-
302 AM PDT Wed Aug 19 2026

.REST OF TODAY...Patchy smoke early. Mostly clear. Highs 89 to
95. Northwest winds up to 10 mph.
.TONIGHT...Mostly clear. Patchy smoke. Lows 49 to 63. Northwest
winds 10 to 15 mph.
.THURSDAY...Sunny. Patchy smoke. Highs 93 to 101. Northwest winds
up to 10 mph in the morning, shifting to southeast around 10 mph
in the afternoon. Gusts to 20 mph.
.THURSDAY NIGHT...Increasing clouds. Lows 53 to 66. Northwest
winds 10 to 15 mph with gusts to 25 mph.
.FRIDAY...Partly sunny. Highs 94 to 103. Light winds in the
morning, becoming southeast up to 10 mph in the afternoon.
.FRIDAY NIGHT...Mostly cloudy. Lows 56 to 68.
.SATURDAY...Decreasing clouds. A slight chance of showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
86 to 95.
.SATURDAY NIGHT...Partly cloudy. A slight chance of rain showers
in the evening. Chance of rain 20 percent. Lows 45 to 59.
.SUNDAY...Patchy fog in the morning. Sunny. Highs 81 to 89.
.SUNDAY NIGHT...Mostly clear. Lows 44 to 58.
.MONDAY...Mostly sunny. Highs 85 to 93.
.MONDAY NIGHT...Partly cloudy. A slight chance of rain showers in
the evening. Chance of rain 20 percent. Lows 49 to 63.
.TUESDAY...Mostly sunny. Highs 84 to 92.

&&
               TEMPERATURE
Baker City      92  49  97

$$
=

ORZ061-191800-
Harney County-
302 AM PDT Wed Aug 19 2026

.REST OF TODAY...Patchy smoke early this morning. Partly cloudy.
Highs 84 to 94. Northwest winds up to 10 mph early this morning,
shifting to southeast this afternoon.
.TONIGHT...Mostly clear. Lows 52 to 61. Northeast winds 10 to
15 mph.
.THURSDAY...Patchy smoke in the morning. Mostly sunny. Highs
87 to 97. Southwest winds 10 to 15 mph.
.THURSDAY NIGHT...Increasing clouds. Lows 55 to 63. West winds
10 to 15 mph.
.FRIDAY...Mostly cloudy in the morning, then becoming partly
sunny. Highs 87 to 97. West winds 10 to 15 mph.
.FRIDAY NIGHT...Mostly cloudy. Lows 54 to 63.
.SATURDAY...Decreasing clouds. Highs 81 to 91. Breezy.
.SATURDAY NIGHT THROUGH SUNDAY NIGHT...Mostly clear. Lows 45 to
56. Highs 78 to 88.
.MONDAY...Mostly sunny. Highs 81 to 91.
.MONDAY NIGHT...Partly cloudy. A slight chance of showers in the
evening. Chance of rain 20 percent. Lows 49 to 59.
.TUESDAY...Mostly sunny. Highs 80 to 90.

&&
               TEMPERATURE
Burns           93  53  95

$$
=

ORZ063-191800-
Malheur County-
402 AM MDT Wed Aug 19 2026 /302 AM PDT Wed Aug 19 2026/

.REST OF TODAY...Mostly clear. Highs 91 to 98. North winds up to
10 mph. Gusts to 20 mph this afternoon.
.TONIGHT...Mostly clear. Patchy smoke after midnight. Lows 57 to
66. Northeast winds 10 to 15 mph.
.THURSDAY...Patchy smoke in the morning. Mostly sunny. Highs
95 to 101. Southwest winds 10 to 15 mph. Gusts to 25 mph in the
afternoon.
.THURSDAY NIGHT...Increasing clouds. Lows 59 to 68. West winds
10 to 15 mph.
.FRIDAY...Partly sunny. Highs 96 to 102. Southwest winds up to
10 mph in the morning, shifting to northeast in the afternoon.
.FRIDAY NIGHT...Mostly cloudy. Lows 61 to 69.
.SATURDAY AND SATURDAY NIGHT...Partly cloudy. Highs 90 to 95.
Lows 52 to 62. Breezy.
.SUNDAY...Sunny. Highs 85 to 91.
.SUNDAY NIGHT AND MONDAY...Partly cloudy. Lows 52 to 62. Highs
88 to 93.
.MONDAY NIGHT...Partly cloudy. A slight chance of showers in the
evening. Chance of rain 20 percent. Lows 55 to 65.
.TUESDAY...Partly sunny in the morning, then clearing. Highs
87 to 93.

$$
=