What is the best way to use the Idaho climate data?
Use the monthly high and low averages to compare county by season, then open the climate trends page for a month-by-month chart.
County count
44
Summer candidates
8
Winter candidates
0
Idaho Climate Summary
Seasonal climate context for search and comparison
Idaho includes 44 county records. The annual average high is 56.6℉ and the annual average low is 33.1℉ based on the monthly climate dataset.
July has the highest average high at 83.5℉, while January has the lowest average low at 17.8℉. This helps compare summer comfort and winter warmth without relying on a single daily weather snapshot.
Under the default summer filter, 8 county match the cooling criteria. Under the default winter filter, 0 county match the warm-winter criteria.
Cool-summer candidates include Boundary County, Custer County, Shoshone County.
Idaho Monthly Temperature Charts
State / County Average high Average low
Jan
33.1℉
17.8℉
Feb
37.8℉
19.6℉
Mar
46.6℉
25.7℉
Apr
54.3℉
30.9℉
May
64.2℉
38.7℉
Jun
72.7℉
45.0℉
Jul
83.5℉
51.8℉
Aug
82.4℉
50.4℉
Sep
72.3℉
42.6℉
Oct
57.2℉
33.1℉
Nov
42.3℉
24.4℉
Dec
32.7℉
17.8℉
Summer candidates
Jun-Aug average high no higher than 78.8℉, scroll to view all 8
| County | Average high | Average low |
|---|---|---|
| Boundary County | 71.1℉ | 47.7℉ |
| Custer County | 72.7℉ | 42.1℉ |
| Shoshone County | 73.2℉ | 47.5℉ |
| Lemhi County | 73.4℉ | 44.1℉ |
| Valley County | 74.1℉ | 41.2℉ |
| Bonner County | 74.8℉ | 48.0℉ |
| Idaho County | 74.8℉ | 44.2℉ |
| Teton County | 74.8℉ | 45.0℉ |
Winter candidates
Dec-Feb average low no lower than 41.0℉, scroll to view all 0
| County | Average high | Average low |
|---|---|---|
No matching counties | ||
Idaho County Highlights
Rank counties by summer comfort, winter warmth, and seasonal stability
Coolest Summer
Boundary County Average high 71.1℉ Custer County Average high 72.7℉ Shoshone County Average high 73.2℉ Lemhi County Average high 73.4℉ Valley County Average high 74.1℉ Bonner County Average high 74.8℉ Idaho County Average high 74.8℉ Teton County Average high 74.8℉ Camas County Average high 75.4℉ Clearwater County Average high 75.6℉Warmest Winter
Nez Perce County Average low 26.1℉ Ada County Average low 25.3℉ Benewah County Average low 24.8℉ Canyon County Average low 24.8℉ Latah County Average low 24.8℉ Kootenai County Average low 24.6℉ Payette County Average low 24.6℉ Gem County Average low 23.0℉ Lewis County Average low 23.0℉ Washington County Average low 22.5℉Frequently Asked Questions
Short answers based on the same visible climate data.
What does the summer filter mean?
The default summer filter selects places where June, July, and August average highs are no higher than 78.8℉.
What does the winter filter mean?
The default winter filter selects places where December, January, and February average lows are no lower than 41.0℉.