Average annual temperature is 17.6 °C
Absolute maximum temperature: 41.0 °C
Absolute minimum temperature: -7.0 °C
Number of sunny days: 220 days
Number of rainy days: 145 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) | 20.8 | 23.4 | 26.3 | 29.3 | 32.7 | 39.2 | 40.6 | 41.0 | 36.8 | 31.1 | 28.5 | 21.7 |
| Average daytime temperature (°C) | 12.5 | 14.2 | 17.3 | 21.8 | 27.1 | 32.2 | 34.7 | 35.5 | 31.1 | 23.0 | 17.6 | 13.2 |
| Average temperature (°C) | 7.0 | 7.8 | 11.2 | 15.7 | 21.3 | 26.2 | 28.7 | 29.4 | 25.3 | 17.9 | 11.7 | 8.1 |
| Average night temperature (°C) | 2.9 | 3.5 | 6.9 | 10.7 | 16.6 | 21.0 | 23.8 | 24.3 | 20.5 | 13.9 | 7.3 | 4.6 |
| Absolute minimum temperature (°C) | -7.0 | -6.2 | -4.4 | 4.7 | 7.0 | 16.1 | 19.5 | 18.7 | 16.7 | -0.7 | -1.5 | -2.0 |
| 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 | 14.3 | 13.5 | 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) | 6.6 | 6.4 | 7.2 | 9.3 | 10.0 | 11.8 | 11.7 | 11.8 | 10.4 | 8.1 | 8.1 | 6.7 |
| Precipitation (mm) | 63 | 140 | 139 | 82 | 79 | 57 | 89 | 42 | 268 | 110 | 44 | 66 |
| Sunny days | 20 | 15 | 16 | 18 | 17 | 15 | 15 | 22 | 21 | 17 | 22 | 22 |
| Rainy days | 11 | 13 | 15 | 12 | 14 | 15 | 16 | 9 | 9 | 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