Warm-summer humid continental climate
Climate Castle Rock - Colorado
Annual high63ºF
Annual low35ºF
Precipitation18.79 inch
| Month | HighºF | LowºF | Precipinch | Snowinch |
|---|---|---|---|---|
| Jan | 46 | 18 | 0.62 | 8 |
| Feb | 46 | 20 | 0.65 | 7 |
| Mar | 53 | 26 | 1.83 | 15 |
| Apr | 59 | 33 | 2.20 | 9 |
| May | 69 | 42 | 2.18 | 1 |
| Jun | 79 | 50 | 2.05 | 0 |
| Jul | 85 | 56 | 2.46 | 0 |
| Aug | 83 | 54 | 2.71 | 0 |
| Sep | 76 | 46 | 1.24 | 0 |
| Oct | 65 | 35 | 1.11 | 4 |
| Nov | 53 | 25 | 1.00 | 7 |
| Dec | 45 | 18 | 0.74 | 11 |
- JanHigh 46ºFLow 18ºFPrecip 0.62 inch
- FebHigh 46ºFLow 20ºFPrecip 0.65 inch
- MarHigh 53ºFLow 26ºFPrecip 1.83 inch
- AprHigh 59ºFLow 33ºFPrecip 2.20 inch
- MayHigh 69ºFLow 42ºFPrecip 2.18 inch
- JunHigh 79ºFLow 50ºFPrecip 2.05 inch
- JulHigh 85ºFLow 56ºFPrecip 2.46 inch
- AugHigh 83ºFLow 54ºFPrecip 2.71 inch
- SepHigh 76ºFLow 46ºFPrecip 1.24 inch
- OctHigh 65ºFLow 35ºFPrecip 1.11 inch
- NovHigh 53ºFLow 25ºFPrecip 1.00 inch
- DecHigh 45ºFLow 18ºFPrecip 0.74 inch
Climate summary
What is the average weather in Castle Rock, Colorado?
Castle Rock experiences a humid continental climate, marked by very large seasonal temperature contrasts. Summers are warm, while winters are cold and bring very significant snowfall. Despite the winter moisture, annual precipitation is low overall, with a strong pattern of wetter summers and drier winters.
Castle Rock weather averages
Annual high63ºF
Annual low35ºF
Precipitation18.79 inch
Snowfall62 inch
Daily normals Castle Rock - Colorado - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 45.2 | 17.3 | 0.01 | 0.01 | 0.20 | 0.20 |
| Jan 2 | 45.3 | 17.3 | 0.03 | 0.03 | 0.40 | 0.40 |
| Jan 3 | 45.3 | 17.4 | 0.05 | 0.05 | 0.60 | 0.60 |
| Jan 4 | 45.4 | 17.5 | 0.06 | 0.06 | 0.80 | 0.80 |
| Jan 5 | 45.5 | 17.5 | 0.08 | 0.08 | 1.10 | 1.10 |
| Jan 6 | 45.5 | 17.6 | 0.09 | 0.09 | 1.30 | 1.30 |
| Jan 7 | 45.6 | 17.6 | 0.10 | 0.10 | 1.50 | 1.50 |
| Jan 8 | 45.6 | 17.7 | 0.12 | 0.12 | 1.70 | 1.70 |
| Jan 9 | 45.7 | 17.8 | 0.13 | 0.13 | 1.90 | 1.90 |
| Jan 10 | 45.7 | 17.8 | 0.15 | 0.15 | 2.10 | 2.10 |
| Jan 11 | 45.7 | 17.9 | 0.16 | 0.16 | 2.30 | 2.30 |
| Jan 12 | 45.7 | 17.9 | 0.18 | 0.18 | 2.50 | 2.50 |
| Jan 13 | 45.8 | 18.0 | 0.19 | 0.19 | 2.80 | 2.80 |
| Jan 14 | 45.8 | 18.0 | 0.21 | 0.21 | 3.00 | 3.00 |
| Jan 15 | 45.8 | 18.1 | 0.22 | 0.22 | 3.20 | 3.20 |
| Jan 16 | 45.8 | 18.1 | 0.24 | 0.24 | 3.40 | 3.40 |
| Jan 17 | 45.8 | 18.2 | 0.26 | 0.26 | 3.70 | 3.70 |
| Jan 18 | 45.8 | 18.2 | 0.27 | 0.27 | 3.90 | 3.90 |
| Jan 19 | 45.8 | 18.2 | 0.29 | 0.29 | 4.20 | 4.20 |
| Jan 20 | 45.7 | 18.2 | 0.31 | 0.31 | 4.50 | 4.50 |
| Jan 21 | 45.7 | 18.3 | 0.33 | 0.33 | 4.80 | 4.80 |
| Jan 22 | 45.7 | 18.3 | 0.35 | 0.35 | 5.10 | 5.10 |
| Jan 23 | 45.7 | 18.3 | 0.37 | 0.37 | 5.40 | 5.40 |
| Jan 24 | 45.6 | 18.3 | 0.39 | 0.39 | 5.70 | 5.70 |
| Jan 25 | 45.6 | 18.3 | 0.41 | 0.41 | 6.00 | 6.00 |
| Jan 26 | 45.6 | 18.3 | 0.43 | 0.43 | 6.40 | 6.40 |
| Jan 27 | 45.5 | 18.3 | 0.45 | 0.45 | 6.70 | 6.70 |
| Jan 28 | 45.5 | 18.4 | 0.48 | 0.48 | 7.00 | 7.00 |
| Jan 29 | 45.5 | 18.4 | 0.50 | 0.50 | 7.40 | 7.40 |
| Jan 30 | 45.5 | 18.4 | 0.53 | 0.53 | 7.70 | 7.70 |
| Jan 31 | 45.4 | 18.4 | 0.55 | 0.55 | 8.00 | 8.00 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Castle Rock - September 2025
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Sep 1 | 77.0 | 48.0 | 0.00 |
| Sep 2 | 78.1 | 50.0 | – |
| Sep 3 | 82.0 | 52.0 | – |
| Sep 4 | 82.9 | 53.1 | 0.00 |
| Sep 5 | 86.0 | 48.0 | 0.12 |
| Sep 6 | 62.1 | 43.0 | 0.00 |
| Sep 7 | 82.0 | 55.9 | 0.00 |
| Sep 8 | 82.9 | 51.1 | 0.00 |
| Sep 9 | 84.0 | – | 0.00 |
| Sep 10 | 84.9 | 55.9 | 0.00 |
| Sep 11 | 91.9 | 62.1 | 0.00 |
| Sep 12 | 91.0 | 60.1 | 0.00 |
| Sep 13 | 77.0 | 52.0 | 0.00 |
| Sep 14 | 73.9 | 48.0 | 0.20 |
| Sep 15 | 71.1 | 48.0 | 0.00 |
| Sep 16 | 84.0 | 46.9 | 0.02 |
| Sep 17 | 72.0 | 42.1 | 0.35 |
| Sep 18 | 69.1 | 42.1 | 0.16 |
| Sep 19 | 71.1 | 45.0 | 0.00 |
| Sep 20 | 77.0 | 46.9 | 0.00 |
| Sep 21 | 73.9 | 48.9 | 0.00 |
| Sep 22 | 78.1 | 46.0 | 0.00 |
| Sep 23 | 75.0 | 45.0 | 0.83 |
| Sep 24 | 55.0 | 45.0 | 0.32 |
| Sep 25 | 68.0 | 41.0 | 0.00 |
| Sep 26 | 77.0 | 41.0 | 0.00 |
| Sep 27 | 79.0 | 45.0 | 0.00 |
| Sep 28 | 81.0 | 51.1 | 0.00 |
| Sep 29 | 79.0 | 46.0 | 0.00 |
| Sep 30 | 72.0 | 45.0 | 0.00 |
The data for September 2025 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
- Highest max temperature91.9ºF · Sep 11
- Lowest max temperature55.0ºF · Sep 24
- Highest min temperature62.1ºF · Sep 11
- Lowest min temperature41.0ºF · Sep 25
Geo Castle Rock - Colorado
Location
- Country
- United States
- State
- Colorado
- County
- Douglas
- City
- Castle Rock
- Zip Code
- 80104
- Elevation
- 6325 ft
- Longitude
- -104.85
- Latitude
- 39.38
- ICAO
- –
- IATA
- –