Average annual temperature is 9.6 °C
Absolute maximum temperature: 37.6 °C
Absolute minimum temperature: -31.0 °C
Number of sunny days: 215 days
Number of rainy days: 111 days
Number of snow days: 39 days
Look at detailed online map of Castle Rock (historical)
* Weather data for Castle Rock (historical) 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) | 11.8 | 13.0 | 10.3 | 27.3 | 28.9 | 29.7 | 37.6 | 35.7 | 34.2 | 26.4 | 17.1 | 16.8 |
| Average daytime temperature (°C) | 3.6 | 3.1 | 2.4 | 13.5 | 22.8 | 24.5 | 30.5 | 30.3 | 26.0 | 14.3 | 10.5 | 7.7 |
| Average temperature (°C) | -1.4 | -2.6 | -3.5 | 6.2 | 16.0 | 18.7 | 23.5 | 23.2 | 18.9 | 8.0 | 4.7 | 2.1 |
| Average night temperature (°C) | -4.8 | -7.1 | -7.6 | 0.9 | 10.2 | 13.6 | 16.8 | 17.3 | 13.2 | 3.6 | 0.6 | -1.4 |
| Absolute minimum temperature (°C) | -19.9 | -31.0 | -14.8 | -6.6 | 2.6 | 9.8 | 9.0 | 12.7 | 9.0 | -14.7 | -9.5 | -6.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 |
| Daylight mean duration (h) | 9.1 | 10.4 | 11.9 | 13.5 | 14.9 | 15.7 | 15.3 | 14.1 | 12.5 | 10.9 | 9.5 | 8.7 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 5.9 | 7.2 | 7.9 | 9.6 | 10.9 | 11.8 | 13.4 | 11.6 | 10.9 | 7.4 | 7.0 | 6.3 |
| Precipitation (mm) | 21 | 31 | 32 | 33 | 56 | 106 | 6 | 26 | 57 | 39 | 4 | 11 |
| Sunny days | 22 | 18 | 16 | 15 | 11 | 11 | 24 | 19 | 20 | 16 | 22 | 21 |
| Rainy days | 3 | 4 | 3 | 10 | 20 | 19 | 7 | 12 | 10 | 12 | 6 | 5 |
| Snow days | 6 | 6 | 12 | 5 | 0 | 0 | 0 | 0 | 0 | 3 | 2 | 5 |
The best time to visit Castle Rock (historical) during the most sunny months:
Months with the longest average daylight duration in Castle Rock (historical):
The largest precipitation sum in Castle Rock (historical) is at