Average annual temperature is 11.9 °C
Absolute maximum temperature: 40.0 °C
Absolute minimum temperature: -12.2 °C
Number of sunny days: 219 days
Number of rainy days: 120 days
Number of snow days: 26 days
Look at detailed online map of Ada County
* Weather data for Ada County United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 10.5 | 11.1 | 13.5 | 30.4 | 32.4 | 33.7 | 40.0 | 39.2 | 32.3 | 27.5 | 16.7 | 12.0 |
| Average daytime temperature (°C) | 4.2 | 6.1 | 7.3 | 15.4 | 24.7 | 26.4 | 35.5 | 32.6 | 27.2 | 18.5 | 9.8 | 5.1 |
| Average temperature (°C) | 0.3 | 0.5 | 2.4 | 8.7 | 18.1 | 19.8 | 28.2 | 25.6 | 19.7 | 12.3 | 5.0 | 1.4 |
| Average night temperature (°C) | -2.6 | -3.1 | -1.1 | 3.6 | 11.8 | 13.8 | 20.2 | 19.0 | 13.5 | 7.5 | 1.2 | -1.2 |
| Absolute minimum temperature (°C) | -12.2 | -8.8 | -4.4 | -4.0 | 4.8 | 6.7 | 15.6 | 13.0 | 6.9 | -4.1 | -7.8 | -6.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.4 | 15.0 | 13.9 | 12.5 | 11.0 | 9.7 | 9.0 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 6.1 | 7.6 | 7.5 | 10.0 | 12.2 | 11.8 | 13.5 | 11.7 | 10.4 | 8.6 | 6.9 | 5.0 |
| Precipitation (mm) | 42 | 21 | 78 | 27 | 43 | 48 | 0 | 20 | 16 | 30 | 23 | 52 |
| Sunny days | 16 | 17 | 8 | 13 | 16 | 12 | 30 | 20 | 26 | 24 | 19 | 18 |
| Rainy days | 10 | 8 | 14 | 14 | 15 | 18 | 1 | 11 | 4 | 7 | 9 | 9 |
| Snow days | 5 | 3 | 9 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 4 |
The best time to visit Ada County during the most sunny months:
Months with the longest average daylight duration in Ada County:
The largest precipitation sum in Ada County is at