Average annual temperature is 13.0 °C
Absolute maximum temperature: 35.1 °C
Absolute minimum temperature: -8.8 °C
Number of sunny days: 185 days
Number of rainy days: 176 days
Number of snow days: 4 days
Look at detailed online map of Grayson
* Weather data for Grayson 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) | 19.0 | 20.0 | 25.3 | 26.5 | 26.5 | 30.5 | 35.1 | 33.3 | 32.7 | 27.0 | 23.4 | 16.9 |
| Average daytime temperature (°C) | 9.7 | 12.8 | 13.7 | 19.3 | 21.2 | 24.6 | 29.8 | 28.2 | 25.1 | 19.8 | 13.4 | 10.3 |
| Average temperature (°C) | 4.6 | 7.2 | 7.2 | 12.6 | 15.4 | 18.6 | 23.3 | 22.2 | 18.8 | 13.7 | 7.3 | 4.9 |
| Average night temperature (°C) | 1.4 | 3.2 | 2.3 | 7.1 | 10.6 | 13.8 | 18.2 | 17.6 | 14.2 | 9.0 | 2.9 | 1.3 |
| Absolute minimum temperature (°C) | -7.2 | -8.8 | -7.8 | -1.0 | 2.8 | 8.5 | 14.8 | 12.8 | 10.7 | 3.1 | -6.4 | -5.7 |
| 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 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.8 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.2 | 9.7 |
| 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) | 5.4 | 6.5 | 8.0 | 9.6 | 10.3 | 10.7 | 11.8 | 10.4 | 9.7 | 9.0 | 8.0 | 6.0 |
| Precipitation (mm) | 74 | 97 | 89 | 87 | 68 | 97 | 71 | 64 | 48 | 18 | 35 | 90 |
| Sunny days | 16 | 15 | 14 | 15 | 12 | 13 | 11 | 12 | 18 | 20 | 24 | 15 |
| Rainy days | 14 | 13 | 16 | 15 | 19 | 17 | 20 | 19 | 12 | 11 | 6 | 14 |
| Snow days | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
The best time to visit Grayson during the most sunny months:
The largest precipitation sum in Grayson is at