Cheyenne, WY Weather - Forecast & Monthly Averages

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Weather Quick Facts

The highest monthly average temperature in Cheyenne for July is 70.1 degrees
The lowest monthly average temperature in Cheyenne for December is 27.2 degrees
The most monthly precipitation in Cheyenne occurs in July with 2.4 inches
The air quality index in Cheyenne is 2% worse than the national average
The pollution index in Cheyenne is 85% better than the national average

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Cheyenne 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	17°F	43°F	29°F	0.3"
February	17°F	43°F	29°F	0.6"
March	24°F	54°F	38°F	0.8"
April	29°F	59°F	43°F	1.7"
May	38°F	66°F	51°F	2.3"
June	48°F	81°F	64°F	1.9"
July	55°F	87°F	70°F	2.4"
August	53°F	85°F	68°F	1.6"
September	45°F	77°F	60°F	1.4"
October	33°F	63°F	47°F	1.2"
November	24°F	53°F	38°F	0.5"
December	15°F	41°F	27°F	0.6"

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Cheyenne 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	Cheyenne	Wyoming	National
Air quality index	43	39	42
Pollution index	396,188	1,779,975	2,726,193

Cheyenne air quality information

Measurement	Total
Days measured	365
Days with good air quality	305
Days with moderate air quality	60
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Cheyenne air quality information

Pollutant	Total
Arsenic	0.000%
Benzene	0.010%
Carbon Tetrachloride	0.001%
Lead	0.002%
Mercury	0.000%

Average monthly Cheyenne temperature with heat index

Cheyenne monthly precipitation with daily maximum

Cheyenne monthly snow depth with daily maximum

Cheyenne monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Ranchettes, WY	6,384	43	14.0%
South Greeley, WY	4,473	43	14.0%
Warren AFB, WY	2,997	43	14.0%
Fox Farm-College, WY	4,105	43	14.0%
Cheyenne, WY	64,099	43	14.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
South Hill, WA	64,104	30	40.0%
San Marcos, TX	64,053	44	12.0%
Youngstown, OH	64,152	42	16.0%
Lake Elsinore, CA	64,201	89	78.0%
Bellevue, NE	63,970	40	20.0%
Cheyenne, WY	64,099	43	14.0%

Source: The Cheyenne, WY 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.