Skip to content
VSWeather

Castle Rock, CO weather and climate

Douglas County, CO · population 76,614 · about 6,309 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Castle Rock's own coordinates.

The year at a glance

Sunny days
274
clear or partly cloudy, per year
Precipitation
18 in
per year
Wet days
93
rain or snow per year
Snowfall
58 in
per year
Hot days
23
above 90 °F
Freezing nights
161
at or below 32 °F
Humidity
57%
average relative
Average temperature
50 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
20406080JanMarMayJulSepNovDaily high, Jan: 46 °FDaily high, Feb: 47 °FDaily high, Mar: 54 °FDaily high, Apr: 59 °FDaily high, May: 68 °FDaily high, Jun: 80 °FDaily high, Jul: 86 °FDaily high, Aug: 84 °FDaily high, Sep: 77 °FDaily high, Oct: 65 °FDaily high, Nov: 54 °FDaily high, Dec: 46 °FDaily low, Jan: 18 °FDaily low, Feb: 20 °FDaily low, Mar: 26 °FDaily low, Apr: 33 °FDaily low, May: 42 °FDaily low, Jun: 51 °FDaily low, Jul: 56 °FDaily low, Aug: 55 °FDaily low, Sep: 47 °FDaily low, Oct: 35 °FDaily low, Nov: 26 °FDaily low, Dec: 18 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high464754596880868477655446
Daily low182026334251565547352618

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.01.02.03.0JanMarMayJulSepNovCastle Rock, Jan: 0.6 inCastle Rock, Feb: 0.7 inCastle Rock, Mar: 1.6 inCastle Rock, Apr: 2.5 inCastle Rock, May: 2.9 inCastle Rock, Jun: 2.0 inCastle Rock, Jul: 2.1 inCastle Rock, Aug: 1.7 inCastle Rock, Sep: 1.2 inCastle Rock, Oct: 1.4 inCastle Rock, Nov: 0.9 inCastle Rock, Dec: 0.7 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Castle Rock0.60.71.62.52.92.02.11.71.21.40.90.7

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovCastle Rock, Jan: 23 daysCastle Rock, Feb: 20 daysCastle Rock, Mar: 22 daysCastle Rock, Apr: 19 daysCastle Rock, May: 20 daysCastle Rock, Jun: 24 daysCastle Rock, Jul: 25 daysCastle Rock, Aug: 24 daysCastle Rock, Sep: 25 daysCastle Rock, Oct: 24 daysCastle Rock, Nov: 24 daysCastle Rock, Dec: 24 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Castle Rock232022192024252425242424

Compare Castle Rock with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered Colorado city

About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).