Idaho Climate Data
NOAA 30-year climate normals for all 44 counties.
State Avg Temp
46.5°F
Hottest County
Nez Perce County
53.8°F avg
Coldest County
Custer County
40.8°F avg
Wettest County
Shoshone County
38.2" precip
All Idaho Counties
Ada County
52.8°F avg
Adams County
45.3°F avg
Bannock County
47.5°F avg
Bear Lake County
41.0°F avg
Benewah County
47.2°F avg
Bingham County
46.0°F avg
Blaine County
41.3°F avg
Boise County
45.0°F avg
Bonner County
45.7°F avg
Bonneville County
43.8°F avg
Boundary County
47.5°F avg
Butte County
42.5°F avg
Camas County
42.1°F avg
Canyon County
52.0°F avg
Caribou County
43.0°F avg
Cassia County
48.2°F avg
Clark County
45.3°F avg
Clearwater County
45.7°F avg
Custer County
40.8°F avg
Elmore County
52.6°F avg
Franklin County
47.0°F avg
Fremont County
41.1°F avg
Gem County
49.7°F avg
Gooding County
50.6°F avg
Idaho County
44.8°F avg
Jefferson County
44.8°F avg
Jerome County
49.6°F avg
Kootenai County
46.9°F avg
Latah County
46.6°F avg
Lemhi County
43.2°F avg
Lewis County
46.8°F avg
Lincoln County
49.4°F avg
Madison County
44.4°F avg
Minidoka County
47.8°F avg
Nez Perce County
53.8°F avg
Oneida County
46.8°F avg
Owyhee County
49.7°F avg
Payette County
53.2°F avg
Power County
47.0°F avg
Shoshone County
44.1°F avg
Teton County
40.8°F avg
Twin Falls County
49.6°F avg
Valley County
43.1°F avg
Washington County
51.9°F avg
Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.