Average annual temperature is 11.9 °C
Absolute maximum temperature: 32.9 °C
Absolute minimum temperature: -9.7 °C
Number of sunny days: 179 days
Number of rainy days: 183 days
Number of snow days: 3 days
Look at detailed online map of Grayson County
* Weather data for Grayson County 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) | 17.7 | 19.0 | 23.8 | 24.8 | 25.2 | 28.9 | 32.9 | 31.2 | 30.5 | 25.1 | 21.3 | 15.5 |
| Average daytime temperature (°C) | 8.9 | 11.9 | 12.7 | 18.0 | 19.6 | 23.1 | 28.5 | 26.7 | 23.8 | 18.5 | 12.5 | 9.2 |
| Average temperature (°C) | 3.6 | 6.3 | 6.3 | 11.3 | 14.1 | 17.4 | 22.0 | 20.8 | 17.7 | 12.3 | 6.2 | 3.8 |
| Average night temperature (°C) | 0.1 | 2.1 | 1.5 | 5.6 | 9.5 | 12.8 | 16.8 | 16.2 | 13.2 | 7.6 | 1.6 | 0.2 |
| Absolute minimum temperature (°C) | -8.3 | -9.7 | -9.0 | -1.4 | 2.4 | 8.7 | 14.4 | 11.8 | 8.3 | 1.7 | -7.3 | -7.3 |
| 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) | 5.5 | 6.4 | 8.2 | 9.5 | 10.0 | 10.6 | 12.0 | 10.3 | 10.4 | 8.8 | 7.9 | 6.0 |
| Precipitation (mm) | 77 | 111 | 74 | 84 | 88 | 72 | 66 | 68 | 49 | 10 | 36 | 81 |
| Sunny days | 14 | 15 | 16 | 14 | 12 | 12 | 9 | 11 | 14 | 22 | 24 | 16 |
| Rainy days | 16 | 13 | 14 | 16 | 19 | 18 | 22 | 20 | 16 | 9 | 6 | 14 |
| Snow days | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Grayson County during the most sunny months:
The largest precipitation sum in Grayson County is at