Castle Rock, CO Weather - Forecast & Monthly Averages

TEMPERATURE	33
HUMIDITY	51
PRESSURE	102300
WIND COND.	180 13

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Weather Quick Facts

The highest monthly average temperature in Castle Rock for July is 72.9 degrees
The lowest monthly average temperature in Castle Rock for December is 30.2 degrees
The most monthly precipitation in Castle Rock occurs in July with 2.3 inches
The air quality index in Castle Rock is 38% worse than the national average
The pollution index in Castle Rock is 59% better than the national average

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Castle Rock Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	19°F	46°F	32°F	0.5"
February	20°F	48°F	33°F	0.5"
March	28°F	58°F	42°F	0.9"
April	33°F	63°F	47°F	2.0"
May	42°F	70°F	55°F	2.3"
June	53°F	85°F	68°F	2.0"
July	59°F	88°F	73°F	2.3"
August	57°F	86°F	71°F	2.1"
September	49°F	79°F	63°F	1.7"
October	37°F	67°F	51°F	1.3"
November	28°F	58°F	41°F	0.4"
December	18°F	45°F	30°F	0.5"

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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.
Index	Castle Rock	Colorado	National
Air quality index	58	38	42
Pollution index	1,130,190	2,068,342	2,726,193

Castle Rock air quality

Measurement	Total
Days measured	365
Days with good air quality	91
Days with moderate air quality	252
Days w/ poor A.Q. for sensitive groups	20
Days with unhealthy air quality	2

Air quality details

Pollutant	Total
Arsenic	0.000%
Benzene	0.020%
Carbon Tetrachloride	0.002%
Lead	0.010%
Mercury	0.000%

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	Population	Air Quality Index	National Avg.
Larkspur, CO	244	45	10.0%
Perry Park, CO	1,821	45	10.0%
Castle Pines Village, CO	4,558	58	16.0%
Rock Creek Park, CO	80	58	16.0%
Acres Green, CO	2,888	58	16.0%
Castle Rock, CO	65,176	58	16.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Jupiter, FL	65,139	36	28.0%
Bayonne, NJ	65,112	51	2.0%
Medicine Hat, AB	65,247	n/a
Bethesda, MD	65,092	47	6.0%
Sammamish, WA	65,265	45	10.0%
Castle Rock, CO	65,176	58	16.0%

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.