Average annual temperature is 21.4 °C
Absolute maximum temperature: 42.6 °C
Absolute minimum temperature: 0.1 °C
Number of sunny days: 177 days
Number of rainy days: 188 days
Look at detailed online map of Grimes County
* Weather data for Grimes 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) | 24.4 | 26.8 | 28.9 | 31.2 | 31.4 | 38.1 | 39.6 | 42.6 | 39.9 | 34.7 | 29.3 | 26.3 |
| Average daytime temperature (°C) | 17.9 | 19.3 | 23.4 | 24.1 | 28.0 | 34.0 | 36.7 | 39.4 | 34.6 | 27.3 | 20.4 | 19.0 |
| Average temperature (°C) | 13.0 | 13.5 | 17.9 | 18.5 | 23.1 | 28.1 | 30.8 | 32.7 | 28.6 | 21.6 | 15.3 | 13.0 |
| Average night temperature (°C) | 9.4 | 9.4 | 13.7 | 14.3 | 19.0 | 23.2 | 25.5 | 26.6 | 23.7 | 17.4 | 11.6 | 8.4 |
| Absolute minimum temperature (°C) | 0.1 | 0.2 | 3.4 | 9.3 | 11.9 | 19.3 | 23.1 | 23.6 | 18.7 | 6.0 | 3.6 | 1.6 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.4 | 11.1 | 12.0 | 12.9 | 13.7 | 14.1 | 13.9 | 13.2 | 12.3 | 11.4 | 10.6 | 10.2 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 6.2 | 6.8 | 7.6 | 7.6 | 8.8 | 11.2 | 12.1 | 12.2 | 10.5 | 8.4 | 6.5 | 8.0 |
| Precipitation (mm) | 137 | 48 | 60 | 197 | 186 | 118 | 22 | 2 | 73 | 91 | 72 | 34 |
| Sunny days | 14 | 13 | 11 | 6 | 7 | 11 | 20 | 27 | 15 | 16 | 17 | 20 |
| Rainy days | 17 | 15 | 20 | 24 | 24 | 19 | 11 | 4 | 15 | 15 | 13 | 11 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Grimes County during the most sunny months:
The largest precipitation sum in Grimes County is at