Average annual temperature is 18.0 °C
Absolute maximum temperature: 41.2 °C
Absolute minimum temperature: -6.9 °C
Number of sunny days: 216 days
Number of rainy days: 149 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) | 22.0 | 25.7 | 28.4 | 29.7 | 33.2 | 40.7 | 40.3 | 41.2 | 38.6 | 31.1 | 28.0 | 20.9 |
| Average daytime temperature (°C) | 14.2 | 15.2 | 18.1 | 22.0 | 27.2 | 32.9 | 36.0 | 37.2 | 32.2 | 23.7 | 17.8 | 13.7 |
| Average temperature (°C) | 7.9 | 7.7 | 11.8 | 15.8 | 21.4 | 26.4 | 29.4 | 30.5 | 26.1 | 18.4 | 12.0 | 8.6 |
| Average night temperature (°C) | 3.4 | 3.0 | 7.2 | 10.8 | 16.6 | 21.1 | 24.3 | 24.9 | 21.1 | 14.0 | 7.5 | 4.9 |
| Absolute minimum temperature (°C) | -6.9 | -5.9 | -3.6 | 5.5 | 8.0 | 17.1 | 20.9 | 19.1 | 16.2 | 0.3 | -2.1 | -1.7 |
| 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 | 10.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 7.4 | 6.9 | 8.0 | 9.6 | 10.0 | 11.8 | 11.7 | 12.3 | 10.2 | 8.2 | 8.1 | 7.4 |
| Precipitation (mm) | 31 | 113 | 127 | 68 | 50 | 76 | 55 | 3 | 85 | 87 | 23 | 53 |
| Sunny days | 23 | 14 | 19 | 17 | 10 | 8 | 17 | 25 | 19 | 20 | 21 | 23 |
| Rainy days | 8 | 14 | 12 | 13 | 21 | 22 | 14 | 6 | 11 | 11 | 9 | 8 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Foster during the most sunny months:
The largest precipitation sum in Foster is at