Average annual temperature is 19.0 °C
Absolute maximum temperature: 42.7 °C
Absolute minimum temperature: -4.8 °C
Number of sunny days: 203 days
Number of rainy days: 162 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) | 23.2 | 26.0 | 26.3 | 30.0 | 33.0 | 37.9 | 39.3 | 42.7 | 41.0 | 32.1 | 27.7 | 23.1 |
| Average daytime temperature (°C) | 14.5 | 15.4 | 19.2 | 22.0 | 27.9 | 32.8 | 35.6 | 38.4 | 32.8 | 24.5 | 18.2 | 14.6 |
| Average temperature (°C) | 9.2 | 9.3 | 13.5 | 16.4 | 21.9 | 26.6 | 29.9 | 32.2 | 27.0 | 19.2 | 12.7 | 9.3 |
| Average night temperature (°C) | 5.0 | 4.9 | 9.0 | 11.6 | 17.1 | 21.5 | 24.8 | 26.2 | 22.1 | 15.0 | 8.2 | 5.4 |
| Absolute minimum temperature (°C) | -4.8 | -4.6 | -2.8 | 5.4 | 8.7 | 17.3 | 18.6 | 18.5 | 17.4 | -0.7 | -2.1 | -1.3 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.3 | 14.1 | 13.4 | 12.4 | 11.3 | 10.4 | 10.0 |
| 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) | 6.9 | 6.1 | 7.9 | 8.5 | 9.9 | 11.2 | 11.8 | 12.2 | 10.3 | 7.9 | 7.8 | 7.2 |
| Precipitation (mm) | 83 | 111 | 200 | 63 | 151 | 110 | 73 | 5 | 57 | 281 | 76 | 66 |
| Sunny days | 20 | 11 | 12 | 17 | 9 | 10 | 21 | 25 | 16 | 19 | 21 | 22 |
| Rainy days | 11 | 17 | 19 | 13 | 22 | 20 | 10 | 6 | 14 | 12 | 9 | 9 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Grayson County during the most sunny months:
The largest precipitation sum in Grayson County is at