Average annual temperature is 5.4 °C
Absolute maximum temperature: 32.6 °C
Absolute minimum temperature: -21.0 °C
Number of sunny days: 169 days
Number of rainy days: 124 days
Number of snow days: 72 days
Look at detailed online map of Castle Rock
* Weather data for Castle Rock 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) | 3.6 | 5.1 | 8.0 | 18.3 | 22.2 | 24.8 | 32.6 | 30.5 | 27.5 | 20.6 | 14.6 | 7.4 |
| Average daytime temperature (°C) | -2.2 | -0.3 | 1.1 | 7.4 | 16.0 | 20.3 | 28.8 | 26.0 | 21.4 | 14.4 | 6.8 | 2.1 |
| Average temperature (°C) | -5.8 | -6.0 | -4.3 | 1.3 | 8.7 | 13.2 | 21.0 | 18.6 | 13.6 | 6.9 | 1.2 | -4.2 |
| Average night temperature (°C) | -8.6 | -9.9 | -8.2 | -3.6 | 2.2 | 6.6 | 13.0 | 11.8 | 7.0 | 1.4 | -3.2 | -9.2 |
| Absolute minimum temperature (°C) | -21.0 | -17.1 | -13.8 | -10.3 | -3.2 | 2.2 | 7.6 | 7.0 | 0.6 | -7.2 | -12.9 | -18.6 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.3 |
| 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) | 5.0 | 7.6 | 7.9 | 10.1 | 12.5 | 12.4 | 13.3 | 11.8 | 11.1 | 8.7 | 7.4 | 6.4 |
| Precipitation (mm) | 113 | 67 | 102 | 54 | 32 | 58 | 14 | 34 | 42 | 42 | 26 | 44 |
| Sunny days | 7 | 13 | 9 | 17 | 7 | 7 | 20 | 10 | 15 | 20 | 23 | 21 |
| Rainy days | 2 | 1 | 5 | 4 | 24 | 23 | 11 | 21 | 15 | 10 | 5 | 3 |
| Snow days | 22 | 14 | 17 | 9 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 7 |
The best time to visit Castle Rock during the most sunny months:
The largest precipitation sum in Castle Rock is at