Average annual temperature is 10.7 °C
Absolute maximum temperature: 38.2 °C
Absolute minimum temperature: -27.2 °C
Number of sunny days: 185 days
Number of rainy days: 152 days
Number of snow days: 28 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) | 7.7 | 9.1 | 18.6 | 26.4 | 31.6 | 33.1 | 33.9 | 38.2 | 34.7 | 29.5 | 17.2 | 12.7 |
| Average daytime temperature (°C) | 0.9 | 3.6 | 6.9 | 15.5 | 23.5 | 28.4 | 28.6 | 28.4 | 24.9 | 16.1 | 8.7 | 5.6 |
| Average temperature (°C) | -2.8 | -1.9 | 1.5 | 9.1 | 16.7 | 22.1 | 23.0 | 22.9 | 19.6 | 11.9 | 4.1 | 1.8 |
| Average night temperature (°C) | -5.5 | -6.2 | -2.5 | 4.1 | 10.8 | 16.2 | 17.9 | 18.2 | 15.5 | 8.2 | 0.6 | -0.7 |
| Absolute minimum temperature (°C) | -27.2 | -24.1 | -14.9 | -4.5 | 1.0 | 7.9 | 13.4 | 11.5 | 9.7 | -3.9 | -12.1 | -7.7 |
| 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 | 9.0 |
| Daylight mean duration (h) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.3 | 15.0 | 13.9 | 12.5 | 11.0 | 9.7 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 3.9 | 6.7 | 6.6 | 8.5 | 11.7 | 12.6 | 12.6 | 11.6 | 9.3 | 6.7 | 7.0 | 4.0 |
| Precipitation (mm) | 57 | 51 | 78 | 105 | 47 | 32 | 78 | 58 | 113 | 85 | 19 | 40 |
| Sunny days | 14 | 15 | 11 | 18 | 20 | 16 | 15 | 11 | 11 | 12 | 25 | 17 |
| Rainy days | 10 | 9 | 12 | 11 | 11 | 14 | 16 | 20 | 19 | 17 | 4 | 9 |
| Snow days | 7 | 4 | 8 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 5 |
The best time to visit Castle Rock during the most sunny months:
Months with the longest average daylight duration in Castle Rock:
The largest precipitation sum in Castle Rock is at