Average annual temperature is 9.7 °C
Absolute maximum temperature: 37.2 °C
Absolute minimum temperature: -25.5 °C
Number of sunny days: 191 days
Number of rainy days: 139 days
Number of snow days: 35 days
Look at detailed online map of Fountain Valley
* Weather data for Fountain Valley 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) | 6.6 | 9.4 | 11.0 | 26.3 | 31.9 | 33.4 | 35.1 | 37.2 | 34.6 | 28.7 | 16.6 | 12.0 |
| Average daytime temperature (°C) | -0.2 | 1.7 | 4.3 | 14.3 | 22.1 | 28.1 | 29.3 | 27.7 | 23.9 | 15.3 | 7.5 | 4.8 |
| Average temperature (°C) | -3.7 | -3.5 | -0.7 | 7.9 | 15.2 | 21.5 | 23.2 | 21.8 | 18.6 | 11.1 | 2.9 | 1.1 |
| Average night temperature (°C) | -6.5 | -7.8 | -4.9 | 2.8 | 9.2 | 15.3 | 17.3 | 17.1 | 14.4 | 7.5 | -0.7 | -1.8 |
| Absolute minimum temperature (°C) | -25.5 | -24.4 | -14.1 | -4.5 | 0.0 | 7.5 | 12.7 | 9.7 | 7.9 | -3.8 | -12.5 | -8.2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.3 | 10.5 | 11.9 | 13.5 | 14.8 | 15.4 | 15.1 | 14.0 | 12.5 | 11.0 | 9.7 | 8.9 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 4.1 | 6.5 | 7.0 | 7.8 | 10.3 | 12.5 | 12.9 | 11.6 | 9.0 | 6.2 | 6.5 | 4.7 |
| Precipitation (mm) | 44 | 62 | 82 | 97 | 40 | 70 | 47 | 73 | 73 | 122 | 14 | 35 |
| Sunny days | 15 | 14 | 13 | 13 | 17 | 19 | 14 | 21 | 14 | 11 | 22 | 18 |
| Rainy days | 8 | 6 | 9 | 16 | 14 | 11 | 17 | 10 | 16 | 17 | 7 | 8 |
| Snow days | 8 | 8 | 9 | 1 | 0 | 0 | 0 | 0 | 0 | 3 | 1 | 5 |
The best time to visit Fountain Valley during the most sunny months:
Months with the longest average daylight duration in Fountain Valley:
The largest precipitation sum in Fountain Valley is at