Average annual temperature is 5.7 °C
Absolute maximum temperature: 33.7 °C
Absolute minimum temperature: -29.6 °C
Number of sunny days: 199 days
Number of rainy days: 117 days
Number of snow days: 49 days
Look at detailed online map of Foster County
* Weather data for Foster 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) | 1.5 | 3.0 | -0.9 | 13.3 | 27.5 | 33.7 | 33.5 | 32.7 | 32.5 | 28.5 | 11.4 | 11.2 |
| Average daytime temperature (°C) | -7.1 | -4.4 | -6.1 | 3.5 | 22.0 | 26.3 | 25.3 | 25.8 | 23.0 | 11.9 | 4.5 | 2.1 |
| Average temperature (°C) | -10.4 | -9.7 | -9.9 | -0.5 | 15.4 | 20.9 | 19.4 | 20.3 | 17.1 | 6.9 | 0.0 | -2.1 |
| Average night temperature (°C) | -13.2 | -14.0 | -13.3 | -4.2 | 9.4 | 16.0 | 14.4 | 15.9 | 12.5 | 3.0 | -3.7 | -5.1 |
| Absolute minimum temperature (°C) | -26.4 | -29.6 | -19.6 | -13.8 | -1.5 | 9.9 | 8.8 | 9.6 | 5.9 | -12.9 | -12.4 | -12.6 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 10.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 |
| Daylight mean duration (h) | 9.0 | 10.3 | 11.9 | 13.6 | 15.1 | 15.9 | 15.5 | 14.2 | 12.6 | 10.9 | 9.3 | 8.5 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 3.2 | 7.0 | 7.9 | 8.4 | 12.0 | 12.2 | 13.4 | 10.4 | 9.0 | 7.2 | 6.3 | 5.2 |
| Precipitation (mm) | 11 | 9 | 44 | 60 | 94 | 94 | 50 | 55 | 111 | 43 | 10 | 27 |
| Sunny days | 23 | 14 | 14 | 13 | 16 | 12 | 10 | 14 | 18 | 17 | 24 | 24 |
| Rainy days | 0 | 2 | 0 | 12 | 15 | 18 | 21 | 17 | 12 | 10 | 5 | 5 |
| Snow days | 8 | 12 | 17 | 5 | 0 | 0 | 0 | 0 | 0 | 4 | 1 | 2 |
The best time to visit Foster County during the most sunny months:
Months with the longest average daylight duration in Foster County:
The largest precipitation sum in Foster County is at