Average annual temperature is 19.7 °C
Absolute maximum temperature: 42.9 °C
Absolute minimum temperature: -4.0 °C
Number of sunny days: 197 days
Number of rainy days: 168 days
Look at detailed online map of Collin County
* Weather data for Collin 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) | 24.1 | 26.6 | 26.7 | 30.5 | 33.0 | 37.7 | 39.1 | 42.9 | 41.3 | 32.7 | 27.8 | 24.3 |
| Average daytime temperature (°C) | 14.9 | 16.0 | 20.0 | 22.5 | 27.9 | 32.9 | 35.3 | 38.9 | 33.3 | 25.0 | 18.5 | 15.4 |
| Average temperature (°C) | 9.9 | 9.8 | 14.5 | 17.1 | 22.6 | 27.3 | 30.0 | 33.1 | 27.8 | 19.9 | 13.4 | 10.2 |
| Average night temperature (°C) | 5.8 | 5.6 | 10.5 | 12.5 | 18.2 | 22.6 | 25.4 | 27.4 | 22.9 | 15.8 | 9.2 | 6.1 |
| Absolute minimum temperature (°C) | -4.0 | -3.9 | -0.7 | 7.2 | 10.7 | 18.1 | 21.2 | 21.7 | 19.3 | 0.8 | 0.1 | -0.5 |
| 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 | 11.4 | 10.5 | 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) | 6.8 | 6.3 | 7.8 | 8.3 | 9.4 | 11.1 | 11.5 | 12.1 | 10.2 | 8.1 | 7.7 | 7.5 |
| Precipitation (mm) | 101 | 131 | 218 | 142 | 138 | 129 | 87 | 3 | 52 | 242 | 90 | 62 |
| Sunny days | 22 | 12 | 11 | 14 | 13 | 9 | 18 | 28 | 13 | 17 | 20 | 20 |
| Rainy days | 9 | 16 | 20 | 16 | 18 | 21 | 13 | 3 | 17 | 14 | 10 | 11 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Collin County during the most sunny months:
The largest precipitation sum in Collin County is at