TODAY AUG27
TEMPERATURE66°F
HUMIDITY34%
PRESSURE30.17 inHg
WIND COND.270° 5.8 mph
  • 8054Sun20% | 10%
  • 8053Mon10% | 10%
  • 8054Tue20%
  • 8156Wed
  • 8456Thu
daynightWeather update from Denver - Centennial Airport, on 27 Aug 08:53 am MDT

Castle Rock Average Weather

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January-8°F70°F31°F0.7"
February-11°F75°F34°F0.4"
March6°F76°F41°F0.9"
April13°F82°F46°F2.1"
May25°F90°F57°F1.7"
June36°F98°F67°F1.6"
July49°F101°F73°F2.2"
August46°F99°F70°F2.9"
September31°F90°F61°F1.1"
October18°F85°F49°F2.0"
November-3°F77°F42°F0.3"
December-13°F69°F29°F1.1"

Did you know?

  • The highest monthly average temperature in Castle Rock for July is 73 degrees.
  • The lowest monthly average temperature in Castle Rock for December is 29 degrees.
  • The most monthly precipitation in Castle Rock occurs in August with 2.9 inches.
  • The air quality index in Castle Rock is 8% worse than the national average.
  • The pollution index in Castle Rock is 77% better than the national average.

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Compare Castle Rock, CO Weather To Other Cities

Castle Rock air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexCastle RockColoradoNational
Air quality index543850
Pollution index1,130,1902,162,3045,100,859

Castle Rock air quality information

MeasurementTotal
Days measured365
Days with good air quality153
Days with moderate air quality189
Days w/ poor A.Q. for sensitive groups23
Days with unhealthy air quality

Castle Rock air quality information

PollutantTotal
Arsenic0.000%
Benzene0.020%
Carbon Tetrachloride0.002%
Lead0.010%
Mercury0.000%

Average monthly Castle Rock temperature with heat index

Castle Rock monthly precipitation with daily maximum

Castle Rock monthly snow depth with daily maximum

Castle Rock monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Inverness, CO1,9683726%
Rock Creek Park, CO04216%
Perry Park, CO1,6344412%
Larkspur, CO2044412%
Castle Pines Village, CO4,013548%
Castle Rock, CO51,802548%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Placentia, CA51,8608570%
La Crosse, WI51,8644020%
Burlington, NC51,7403138%
Peabody, MA51,868476%
Perth Amboy, NJ51,727536%
Castle Rock, CO51,802548%
Source: The Castle Rock, CO weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.