Average annual temperature is 14.6 °C
Absolute maximum temperature: 34.4 °C
Absolute minimum temperature: -7.9 °C
Number of sunny days: 158 days
Number of rainy days: 204 days
Number of snow days: 3 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) | 21.1 | 24.8 | 25.1 | 29.4 | 29.0 | 32.3 | 34.4 | 33.8 | 32.1 | 29.1 | 25.7 | 19.6 |
| Average daytime temperature (°C) | 11.9 | 14.5 | 14.7 | 21.2 | 23.1 | 26.8 | 30.8 | 28.6 | 25.6 | 20.9 | 15.1 | 11.9 |
| Average temperature (°C) | 6.4 | 8.3 | 8.5 | 14.3 | 17.2 | 21.1 | 24.8 | 23.3 | 20.3 | 15.5 | 8.8 | 6.8 |
| Average night temperature (°C) | 3.0 | 3.6 | 3.6 | 8.8 | 12.1 | 15.7 | 19.9 | 19.0 | 15.7 | 11.1 | 4.1 | 3.1 |
| Absolute minimum temperature (°C) | -6.4 | -7.9 | -7.7 | 1.5 | 4.4 | 10.0 | 15.2 | 13.4 | 11.2 | 2.0 | -6.0 | -4.8 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.8 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 9.6 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.6 | 6.7 | 7.6 | 9.7 | 9.9 | 11.2 | 12.0 | 9.9 | 10.0 | 7.8 | 7.5 | 5.3 |
| Precipitation (mm) | 116 | 109 | 67 | 70 | 112 | 49 | 93 | 158 | 53 | 47 | 48 | 94 |
| Sunny days | 9 | 13 | 16 | 19 | 13 | 9 | 8 | 6 | 14 | 16 | 21 | 14 |
| Rainy days | 21 | 15 | 14 | 11 | 18 | 21 | 23 | 25 | 16 | 15 | 9 | 16 |
| Snow days | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Foster during the most sunny months:
The largest precipitation sum in Foster is at