Average annual temperature is 8.8 °C
Absolute maximum temperature: 37.1 °C
Absolute minimum temperature: -27.2 °C
Number of sunny days: 213 days
Number of rainy days: 124 days
Number of snow days: 28 days
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* Weather data for City of Fairfax 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) | 1.8 | 3.7 | 4.6 | 27.8 | 31.0 | 31.4 | 35.4 | 37.1 | 36.4 | 30.8 | 18.8 | 11.0 |
| Average daytime temperature (°C) | -4.9 | -2.7 | 0.3 | 11.6 | 23.6 | 28.7 | 28.5 | 28.7 | 26.4 | 15.2 | 8.8 | 4.8 |
| Average temperature (°C) | -8.2 | -8.2 | -4.2 | 5.7 | 17.2 | 22.8 | 22.5 | 22.9 | 20.4 | 10.6 | 3.2 | 0.4 |
| Average night temperature (°C) | -11.2 | -12.8 | -8.1 | 1.0 | 11.1 | 17.0 | 16.8 | 18.0 | 15.5 | 6.6 | -0.9 | -2.7 |
| Absolute minimum temperature (°C) | -24.8 | -27.2 | -16.8 | -9.7 | 0.3 | 10.4 | 11.9 | 11.1 | 7.7 | -5.5 | -12.2 | -9.0 |
| 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 | 10.4 | 11.9 | 13.5 | 14.8 | 15.5 | 15.2 | 14.0 | 12.5 | 11.0 | 9.6 | 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) | 4.3 | 7.3 | 6.8 | 8.2 | 11.4 | 13.2 | 12.7 | 11.3 | 10.3 | 7.7 | 6.7 | 4.9 |
| Precipitation (mm) | 47 | 51 | 54 | 127 | 114 | 83 | 49 | 58 | 123 | 117 | 12 | 66 |
| Sunny days | 18 | 17 | 17 | 15 | 20 | 15 | 19 | 17 | 16 | 15 | 22 | 22 |
| Rainy days | 5 | 5 | 5 | 14 | 11 | 15 | 12 | 14 | 14 | 14 | 7 | 8 |
| Snow days | 8 | 6 | 9 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 1 |
The best time to visit City of Fairfax during the most sunny months:
Months with the longest average daylight duration in City of Fairfax:
The largest precipitation sum in City of Fairfax is at