Average annual temperature is 16.9 °C
Absolute maximum temperature: 36.4 °C
Absolute minimum temperature: -5.5 °C
Number of sunny days: 177 days
Number of rainy days: 188 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 | 26.3 | 25.7 | 28.4 | 31.7 | 36.3 | 35.3 | 36.4 | 32.8 | 29.5 | 25.4 | 20.7 |
| Average daytime temperature (°C) | 14.0 | 17.3 | 18.4 | 21.2 | 25.8 | 30.4 | 32.2 | 31.6 | 29.1 | 23.3 | 17.7 | 13.7 |
| Average temperature (°C) | 9.0 | 11.1 | 12.4 | 15.2 | 19.7 | 23.8 | 25.8 | 25.7 | 22.9 | 17.6 | 11.6 | 8.1 |
| Average night temperature (°C) | 5.1 | 6.9 | 7.6 | 10.2 | 14.8 | 18.6 | 21.2 | 21.2 | 17.9 | 12.9 | 7.1 | 3.9 |
| Absolute minimum temperature (°C) | -3.1 | -4.5 | -5.5 | 5.2 | 6.9 | 15.4 | 17.9 | 16.9 | 13.2 | 2.8 | -3.5 | -2.9 |
| 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 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 5.3 | 6.7 | 8.5 | 8.7 | 10.5 | 11.9 | 11.0 | 10.3 | 10.9 | 8.3 | 7.2 | 7.0 |
| Precipitation (mm) | 142 | 179 | 124 | 133 | 89 | 48 | 72 | 102 | 29 | 14 | 55 | 106 |
| Sunny days | 13 | 11 | 17 | 12 | 11 | 12 | 7 | 13 | 14 | 25 | 21 | 21 |
| Rainy days | 18 | 17 | 14 | 18 | 20 | 18 | 24 | 18 | 16 | 6 | 9 | 10 |
| 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