Zone Forecast Product
Issued by NWS Boise, ID
Issued by NWS Boise, ID
932
FPUS55 KBOI 210831
ZFPBOI
Zone Forecasts for Southwest Idaho/Southeast Oregon
National Weather Service Boise ID
230 AM MDT Mon Sep 21 2026
Spot temperatures are for today, tonight, and Tuesday.
IDZ011-211600-
West Central Mountains-
230 AM MDT Mon Sep 21 2026
.TODAY...Areas of fog this morning. Sunny. Highs 68 to 81.
.TONIGHT...Increasing clouds. Lows 42 to 54.
.TUESDAY...Mostly cloudy in the morning, then becoming partly
sunny. Highs 67 to 80.
.TUESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows 40 to 51.
.WEDNESDAY...Sunny. Highs 66 to 79.
.WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...Partly cloudy. Lows
43 to 56. Highs 71 to 84.
.FRIDAY...Mostly sunny. Cooler with highs 61 to 73.
.FRIDAY NIGHT...Partly cloudy. A chance of rain showers, mainly
in the evening. Areas of fog after midnight. Chance of rain
30 percent. Lows 37 to 47.
.SATURDAY AND SATURDAY NIGHT...Partly cloudy. Areas of fog in the
morning. Areas of fog after midnight. Highs 55 to 69. Lows 36 to
46.
.SUNDAY...Areas of fog in the morning. Partly sunny. Highs 55 to
67.
&&
TEMPERATURE
McCall 75 42 74
$$
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IDZ013-211600-
Boise Mountains-
230 AM MDT Mon Sep 21 2026
.TODAY...Patchy fog this morning. Sunny. Highs 69 to 84.
.TONIGHT...Increasing clouds. Lows 41 to 56.
.TUESDAY...Partly cloudy. A chance of rain showers with a slight
chance of thunderstorms in the afternoon. Chance of rain
30 percent. Highs 66 to 81.
.TUESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows 38 to 53.
.WEDNESDAY...Sunny. Highs 69 to 84.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows 41 to 56.
Highs 74 to 89.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows 42 to 57. Highs
65 to 80.
.FRIDAY NIGHT...Partly cloudy. A slight chance of rain showers in
the evening. Chance of rain 20 percent. Lows 34 to 49.
.SATURDAY THROUGH SUNDAY...Partly cloudy. Highs 59 to 74. Lows
33 to 48.
&&
TEMPERATURE
Idaho City 83 45 79
$$
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IDZ028-211600-
Camas Prairie-
230 AM MDT Mon Sep 21 2026
.TODAY...Sunny. Highs 73 to 78. East winds 10 to 15 mph.
.TONIGHT...Mostly cloudy. Lows 42 to 47. East winds up to 10 mph.
.TUESDAY...Decreasing clouds. Highs 71 to 76. East winds up to
10 mph.
.TUESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows 39 to 44. Light winds.
.WEDNESDAY...Sunny. Highs 75 to 80. Northeast winds up to 10 mph
in the morning, shifting to southeast around 10 mph in the
afternoon.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows 44 to 49.
Highs 78 to 83. Breezy.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows 46 to 51. Highs
74 to 79.
.FRIDAY NIGHT THROUGH SUNDAY...Partly cloudy. Lows 36 to 43.
Highs 68 to 73.
&&
TEMPERATURE
Fairfield 76 42 73
$$
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IDZ033-211600-
Upper Weiser River-
230 AM MDT Mon Sep 21 2026
.TODAY...Sunny. Highs 77 to 84. Light winds.
.TONIGHT...Increasing clouds. Lows 52 to 57. Light winds.
.TUESDAY...Mostly cloudy in the morning, then becoming partly
sunny. Highs 77 to 83. Light winds.
.TUESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows 50 to 55. Light winds.
.WEDNESDAY...Sunny. Highs 77 to 82. Light winds in the morning,
becoming southwest up to 10 mph in the afternoon.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows 53 to 58.
Highs 83 to 88.
.THURSDAY NIGHT...Increasing clouds. Lows 55 to 60.
.FRIDAY...Mostly sunny. Highs 73 to 78.
.FRIDAY NIGHT...Partly cloudy with a slight chance of showers in
the evening, then mostly cloudy after midnight. Chance of rain
20 percent. Lows 46 to 51.
.SATURDAY AND SATURDAY NIGHT...Partly cloudy. Highs 68 to 75.
Lows 44 to 49.
.SUNDAY...Partly sunny. Highs 66 to 73.
&&
TEMPERATURE
Council 84 54 83
Cambridge 83 52 83
$$
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ORZ064-211600-
Oregon Lower Treasure Valley-
230 AM MDT Mon Sep 21 2026 /130 AM PDT Mon Sep 21 2026/
.TODAY...Sunny. Highs 81 to 86. East winds up to 10 mph.
.TONIGHT...Increasing clouds. Lows 51 to 57. Light winds.
.TUESDAY...Mostly cloudy in the morning, then becoming mostly
sunny. Highs 82 to 87. Light winds.
.TUESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows 50 to 55. Northwest winds up to 10 mph.
.WEDNESDAY...Sunny. Highs 80 to 85. Northwest winds up to 10 mph
in the morning, becoming light in the afternoon.
.WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...Partly cloudy. Lows
52 to 60. Highs 86 to 91.
.FRIDAY AND FRIDAY NIGHT...Partly cloudy. Not as warm. Highs
77 to 82. Lows 46 to 51.
.SATURDAY AND SATURDAY NIGHT...Partly cloudy. Highs 71 to 76.
Lows 44 to 50.
.SUNDAY...Partly sunny. Highs 70 to 75.
&&
TEMPERATURE
Ontario 85 51 85
$$
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IDZ012-211600-
Lower Treasure Valley-
230 AM MDT Mon Sep 21 2026
.TODAY...Sunny. Highs 81 to 86. Southeast winds 10 to 15 mph with
gusts to 25 mph.
.TONIGHT...Increasing clouds. Lows 52 to 57. Light winds.
.TUESDAY...Partly sunny. Highs 81 to 86. Light winds.
.TUESDAY NIGHT...Decreasing clouds. Lows 50 to 55. Light winds.
.WEDNESDAY...Sunny. Highs 80 to 85. Light winds.
.WEDNESDAY NIGHT...Partly cloudy. Lows 53 to 58.
.THURSDAY...Sunny. Highs 87 to 92. Breezy.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Not as warm. Lows
54 to 59. Highs 77 to 82.
.FRIDAY NIGHT...Partly cloudy. A slight chance of showers in the
evening. Chance of rain 20 percent. Lows 46 to 51.
.SATURDAY AND SATURDAY NIGHT...Partly cloudy. Highs 71 to 76.
Lows 44 to 49.
.SUNDAY...Partly sunny. Highs 70 to 75.
&&
TEMPERATURE
Caldwell 84 53 84
$$
=
IDZ014-211600-
Upper Treasure Valley-
230 AM MDT Mon Sep 21 2026
.TODAY...Areas of fog this morning. Sunny. Highs 82 to 87.
Southeast winds 10 to 15 mph with gusts to 25 mph.
.TONIGHT...Mostly cloudy. Lows 51 to 59. East winds up to 10 mph
with gusts to 20 mph.
.TUESDAY...Partly sunny. Highs 80 to 85. Light winds.
.TUESDAY NIGHT...Decreasing clouds. Lows 49 to 55. East winds up
to 10 mph.
.WEDNESDAY...Sunny. Highs 83 to 88. Southeast winds 10 to 15 mph.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows 51 to 60.
Highs 88 to 93. Breezy.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows 53 to 60. Highs
79 to 84. Windy.
.FRIDAY NIGHT...Partly cloudy. A slight chance of showers in the
evening. Chance of rain 20 percent. Lows 45 to 51. Breezy.
.SATURDAY THROUGH SUNDAY...Partly cloudy. Highs 71 to 79. Lows
43 to 50.
&&
TEMPERATURE
Boise 84 59 83
Mountain Home 86 53 83
$$
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IDZ016-211600-
Western Magic Valley-
230 AM MDT Mon Sep 21 2026
.TODAY...Sunny. Highs 78 to 83. East winds 10 to 15 mph with
gusts to 25 mph.
.TONIGHT...Mostly cloudy. Lows 50 to 55. East winds 10 to 15 mph.
.TUESDAY...Decreasing clouds. Highs 74 to 80. Southeast winds
around 10 mph.
.TUESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows 47 to 52. Southeast winds around 10 mph.
.WEDNESDAY...Sunny. Highs 80 to 85. East winds up to 10 mph.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows 52 to 57.
Highs 84 to 89. Breezy.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows 54 to 59. Highs
78 to 83. Breezy.
.FRIDAY NIGHT THROUGH SUNDAY...Partly cloudy. Lows 44 to 51.
Highs 71 to 78.
&&
TEMPERATURE
Jerome 78 53 74
Twin Falls 79 52 75
$$
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IDZ029-211600-
Owyhee Mountains-
230 AM MDT Mon Sep 21 2026
.TODAY...Mostly sunny. Highs 74 to 81.
.TONIGHT...Mostly cloudy. Lows 50 to 59.
.TUESDAY...Partly cloudy. A slight chance of rain showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
74 to 81.
.TUESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows 49 to 56.
.WEDNESDAY...Sunny. Highs 75 to 83.
.WEDNESDAY NIGHT...Increasing clouds. Lows 52 to 60.
.THURSDAY...Sunny. Highs 81 to 87.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Not as warm. Lows
52 to 59. Highs 71 to 76.
.FRIDAY NIGHT...Partly cloudy. A slight chance of rain showers in
the evening. Chance of rain 20 percent. Lows 42 to 49.
.SATURDAY THROUGH SUNDAY...Partly cloudy. Highs 64 to 73. Lows
41 to 48.
$$
=
IDZ015-211600-
Southwest Highlands-
230 AM MDT Mon Sep 21 2026
.TODAY...Mostly sunny. Highs 77 to 82.
.TONIGHT...Mostly cloudy. Lows 49 to 54.
.TUESDAY...Mostly cloudy in the morning, then partly cloudy with
a chance of showers with a slight chance of thunderstorms in the
afternoon. Chance of rain 30 percent. Highs 73 to 79.
.TUESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows 46 to 51.
.WEDNESDAY...Sunny. Highs 79 to 84.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows 50 to 56.
Highs 82 to 88. Breezy.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows 51 to 56. Highs
76 to 81. Breezy.
.FRIDAY NIGHT...Partly cloudy. A slight chance of rain showers in
the evening. Chance of rain 20 percent. Lows 43 to 48. Breezy.
.SATURDAY THROUGH SUNDAY...Partly cloudy. Highs 69 to 76. Lows
41 to 46.
$$
=
IDZ030-211600-
Southern Twin Falls County-
230 AM MDT Mon Sep 21 2026
.TODAY...Mostly sunny. Highs 77 to 82.
.TONIGHT...Mostly cloudy. Lows 50 to 55.
.TUESDAY...Mostly cloudy. A chance of rain showers with a slight
chance of thunderstorms in the afternoon. Chance of rain
40 percent. Highs 73 to 78.
.TUESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows 46 to 51.
.WEDNESDAY...Sunny. Highs 79 to 84.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows 52 to 57.
Highs 82 to 87. Breezy.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows 54 to 59. Highs
77 to 82. Breezy.
.FRIDAY NIGHT...Partly cloudy. Lows 45 to 50.
.SATURDAY...Sunny. Highs 72 to 77.
.SATURDAY NIGHT AND SUNDAY...Partly cloudy. Lows 43 to 48. Highs
71 to 76.
$$
=
ORZ062-211600-
Baker County-
130 AM PDT Mon Sep 21 2026
.TODAY...Sunny. Highs 76 to 84. Southeast winds up to 10 mph with
gusts to 20 mph.
.TONIGHT...Partly cloudy. Lows 43 to 56. Light winds.
.TUESDAY...Partly sunny. Highs 76 to 83. Light winds.
.TUESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows 37 to 50. Northwest winds up to 10 mph with gusts to 20 mph.
.WEDNESDAY...Sunny. Highs 73 to 81. Northwest winds up to 10 mph
in the morning, becoming light in the afternoon.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows 41 to 54.
Highs 78 to 87.
.THURSDAY NIGHT...Mostly cloudy. Lows 42 to 55.
.FRIDAY...Partly cloudy. A slight chance of rain showers in the
afternoon. Chance of rain 20 percent. Cooler with highs 65 to 75.
.FRIDAY NIGHT...Partly cloudy. A slight chance of rain showers in
the evening. Areas of fog after midnight. Chance of rain
20 percent. Lows 33 to 46.
.SATURDAY...Areas of fog in the morning. Mostly sunny. Highs
63 to 71.
.SATURDAY NIGHT...Increasing clouds. Patchy fog after midnight.
Lows 33 to 46.
.SUNDAY...Areas of fog in the morning. Partly sunny. Highs 62 to
71.
&&
TEMPERATURE
Baker City 82 43 78
$$
=
ORZ061-211600-
Harney County-
130 AM PDT Mon Sep 21 2026
.TODAY...Mostly sunny. Highs 72 to 80. East winds up to 10 mph.
.TONIGHT...Decreasing clouds. Lows 42 to 52. Light winds.
.TUESDAY...Partly sunny in the morning, then clearing. Highs
72 to 80. West winds up to 10 mph. Gusts to 20 mph in the
afternoon.
.TUESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows 37 to 48. Northwest winds 10 to 15 mph.
.WEDNESDAY...Sunny. Highs 72 to 81. Light winds.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows 41 to 53.
Highs 77 to 86.
.THURSDAY NIGHT...Mostly cloudy. Lows 40 to 51.
.FRIDAY THROUGH SUNDAY...Partly cloudy. Not as warm. Highs 62 to
72. Lows 32 to 44.
&&
TEMPERATURE
Burns 80 42 79
$$
=
ORZ063-211600-
Malheur County-
230 AM MDT Mon Sep 21 2026 /130 AM PDT Mon Sep 21 2026/
.TODAY...Mostly sunny. Highs 78 to 83. Northeast winds up to
10 mph. Gusts to 20 mph this afternoon.
.TONIGHT...Mostly cloudy. Lows 47 to 56. North winds up to
10 mph.
.TUESDAY...Mostly sunny. Highs 79 to 85. Northwest winds up to
10 mph.
.TUESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows 45 to 54. Northwest winds up to 10 mph.
.WEDNESDAY...Sunny. Highs 77 to 85. Northwest winds up to 10 mph
in the morning, shifting to east with gusts to 20 mph in the
afternoon.
.WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...Partly cloudy. Lows
48 to 58. Highs 83 to 90. Breezy.
.FRIDAY THROUGH SUNDAY...Partly cloudy. Not as warm. Highs 68 to
78. Lows 39 to 49. Breezy.
$$
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