Average annual temperature is 18.0 °C
Absolute maximum temperature: 40.8 °C
Absolute minimum temperature: -4.9 °C
Number of sunny days: 204 days
Number of rainy days: 161 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) | 23.4 | 25.9 | 26.9 | 28.7 | 31.7 | 39.9 | 39.5 | 40.8 | 36.6 | 32.6 | 27.8 | 19.9 |
| Average daytime temperature (°C) | 13.4 | 15.8 | 18.7 | 22.1 | 27.8 | 33.0 | 34.8 | 35.9 | 31.4 | 24.4 | 17.9 | 13.9 |
| Average temperature (°C) | 8.3 | 9.5 | 12.3 | 15.9 | 21.6 | 26.2 | 28.4 | 29.3 | 25.0 | 18.6 | 11.8 | 8.7 |
| Average night temperature (°C) | 4.5 | 5.4 | 7.7 | 10.7 | 16.4 | 20.6 | 23.6 | 23.8 | 19.6 | 14.3 | 7.3 | 4.8 |
| Absolute minimum temperature (°C) | -3.3 | -4.9 | -3.9 | 5.9 | 6.8 | 16.9 | 19.3 | 17.6 | 15.8 | 0.0 | -1.3 | -1.4 |
| 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 | 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) | 5.8 | 5.8 | 7.9 | 8.9 | 10.6 | 12.2 | 11.3 | 11.7 | 10.5 | 7.9 | 7.9 | 6.8 |
| Precipitation (mm) | 79 | 100 | 173 | 143 | 128 | 57 | 79 | 65 | 68 | 118 | 65 | 48 |
| Sunny days | 17 | 12 | 15 | 19 | 15 | 16 | 11 | 20 | 18 | 17 | 22 | 22 |
| Rainy days | 14 | 16 | 16 | 11 | 16 | 14 | 20 | 11 | 12 | 14 | 8 | 9 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Grayson during the most sunny months:
The largest precipitation sum in Grayson is at