Castle Rock, CO Weather

Castle Rock average temperature

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"
In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.

The highest average temperature in Castle Rock is July at 73.4 degrees. The coldest average temperature in Castle Rock is December at 28.9 degrees. The most monthly precipitation in Castle Rock occurs in August with 2.9 inches. The Castle Rock weather information is based on the average of the previous 3-7 years of data.

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Castle Rock air quality index & pollution index

IndexCastle RockColoradoNational
Air quality index543850
Pollution index1,130,1902,042,2525,076,858
In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
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The Castle Rock, CO air quality index is a median value which considers the most hazardous air pollutants. The Castle Rock, CO air quality index is 41.4% greater than the Colorado average and 8.7% greater than the national average.

The Castle Rock, CO pollution index is the sum of the most hazardous air pollutants displayed in pounds. The Castle Rock, CO pollution index is 44.7% less than the Colorado average and 77.7% less than the national average.

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

Air pollution 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

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Cities near Castle Rock, CO

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CityScoreMiles
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