Average annual temperature is 18.1 °C
Absolute maximum temperature: 39.1 °C
Absolute minimum temperature: -4.9 °C
Number of sunny days: 195 days
Number of rainy days: 170 days
Look at detailed online map of Mount Vernon (historical)
* Weather data for Mount Vernon (historical) 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) | 21.7 | 23.7 | 25.8 | 28.5 | 32.5 | 37.2 | 36.1 | 39.1 | 33.6 | 32.4 | 27.5 | 20.5 |
| Average daytime temperature (°C) | 13.5 | 15.7 | 17.5 | 22.4 | 28.4 | 32.3 | 33.1 | 33.3 | 30.4 | 24.1 | 17.1 | 13.7 |
| Average temperature (°C) | 8.9 | 10.1 | 12.3 | 16.3 | 22.3 | 26.3 | 27.8 | 27.9 | 24.6 | 19.1 | 11.9 | 8.8 |
| Average night temperature (°C) | 5.3 | 6.2 | 7.8 | 11.5 | 17.0 | 21.0 | 23.4 | 23.5 | 19.9 | 14.7 | 7.7 | 5.1 |
| Absolute minimum temperature (°C) | -3.6 | -4.9 | -4.1 | 6.1 | 7.8 | 17.1 | 19.2 | 17.8 | 15.6 | 0.6 | -1.0 | -1.6 |
| 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 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.2 | 13.4 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 6.0 | 6.3 | 7.9 | 8.6 | 11.4 | 12.5 | 11.3 | 10.6 | 10.6 | 7.9 | 7.8 | 7.2 |
| Precipitation (mm) | 187 | 97 | 202 | 140 | 51 | 136 | 139 | 88 | 33 | 78 | 76 | 87 |
| Sunny days | 13 | 15 | 16 | 15 | 15 | 13 | 10 | 15 | 18 | 22 | 21 | 22 |
| Rainy days | 18 | 13 | 15 | 15 | 16 | 17 | 21 | 16 | 12 | 9 | 9 | 9 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Mount Vernon (historical) during the most sunny months:
The largest precipitation sum in Mount Vernon (historical) is at