Average annual temperature is 13.4 °C
Absolute maximum temperature: 34.6 °C
Absolute minimum temperature: -8.1 °C
Number of sunny days: 178 days
Number of rainy days: 182 days
Number of snow days: 5 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) | 16.6 | 22.9 | 23.4 | 27.8 | 30.2 | 32.6 | 33.5 | 34.6 | 33.9 | 29.4 | 24.8 | 16.5 |
| Average daytime temperature (°C) | 8.6 | 12.9 | 12.9 | 19.0 | 23.1 | 27.2 | 29.9 | 29.3 | 27.1 | 20.0 | 13.2 | 9.9 |
| Average temperature (°C) | 4.1 | 6.0 | 6.4 | 12.2 | 16.7 | 20.8 | 23.9 | 23.2 | 20.5 | 14.3 | 7.3 | 4.8 |
| Average night temperature (°C) | 0.9 | 1.2 | 1.6 | 6.6 | 11.3 | 15.4 | 19.3 | 18.2 | 15.2 | 10.0 | 3.0 | 1.4 |
| Absolute minimum temperature (°C) | -5.5 | -8.1 | -6.5 | 0.0 | 2.4 | 10.2 | 15.4 | 12.8 | 11.4 | 0.0 | -6.9 | -6.4 |
| 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) | 9.8 | 10.8 | 12.0 | 13.2 | 14.3 | 14.8 | 14.6 | 13.6 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 4.1 | 7.5 | 7.6 | 9.6 | 10.0 | 10.9 | 11.4 | 11.1 | 10.2 | 7.3 | 7.4 | 5.3 |
| Precipitation (mm) | 130 | 58 | 114 | 83 | 61 | 125 | 157 | 81 | 59 | 74 | 42 | 56 |
| Sunny days | 6 | 16 | 15 | 15 | 17 | 13 | 9 | 14 | 17 | 19 | 23 | 14 |
| Rainy days | 22 | 12 | 14 | 15 | 14 | 17 | 22 | 17 | 13 | 12 | 7 | 17 |
| Snow days | 3 | 0 | 2 | 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