Average annual temperature is 12.0 °C
Absolute maximum temperature: 31.8 °C
Absolute minimum temperature: -9.3 °C
Number of sunny days: 153 days
Number of rainy days: 208 days
Number of snow days: 4 days
Look at detailed online map of Foster
* Weather data for Foster 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) | 16.1 | 19.9 | 22.7 | 23.6 | 24.5 | 27.3 | 30.2 | 31.8 | 28.4 | 25.7 | 22.2 | 14.4 |
| Average daytime temperature (°C) | 9.7 | 12.6 | 13.8 | 17.5 | 20.1 | 23.4 | 27.6 | 26.9 | 24.2 | 18.6 | 13.4 | 9.7 |
| Average temperature (°C) | 4.2 | 7.4 | 7.4 | 11.3 | 14.2 | 17.2 | 21.3 | 20.6 | 17.5 | 12.1 | 7.1 | 4.1 |
| Average night temperature (°C) | 0.2 | 3.2 | 1.8 | 5.9 | 9.1 | 11.7 | 15.8 | 15.4 | 12.1 | 6.9 | 2.5 | -0.1 |
| Absolute minimum temperature (°C) | -7.2 | -7.0 | -9.3 | -3.0 | -0.1 | 6.1 | 10.5 | 10.3 | 7.0 | 0.2 | -7.2 | -7.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.0 | 5.9 | 8.4 | 8.7 | 9.8 | 11.1 | 11.9 | 10.4 | 11.0 | 9.0 | 7.3 | 6.0 |
| Precipitation (mm) | 167 | 126 | 108 | 154 | 82 | 78 | 57 | 105 | 29 | 19 | 43 | 116 |
| Sunny days | 11 | 9 | 16 | 11 | 8 | 10 | 5 | 13 | 15 | 18 | 21 | 16 |
| Rainy days | 18 | 19 | 15 | 19 | 23 | 20 | 26 | 18 | 15 | 13 | 9 | 13 |
| Snow days | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
The best time to visit Foster during the most sunny months:
The largest precipitation sum in Foster is at