TODAY DEC06
TEMPERATURE23
HUMIDITY79
PRESSURE
WIND COND.260 4.7
  • 2615Fri
  • 3317Sat20%
  • 2413Sun60%60%
  • 156Mon
  • 157Tue
daynightWeather update from Copper Mountain - Red Cliff Pass at
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Keystone Average Temperature

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
January5°F30°F17°F1.4"
February7°F31°F18°F1.1"
March13°F39°F26°F1.3"
April19°F44°F31°F1.7"
May27°F55°F40°F1.4"
June34°F69°F53°F0.5"
July40°F72°F56°F1.9"
August38°F69°F53°F2.0"
September32°F63°F47°F1.4"
October24°F51°F37°F1.1"
November15°F41°F27°F1.0"
December6°F30°F18°F1.4"

Did you know?

  • The highest monthly average temperature in Keystone for July is 56 degrees.
  • The lowest monthly average temperature in Keystone for January is 17 degrees.
  • The most monthly precipitation in Keystone occurs in August with 2 inches.
  • The air quality index in Keystone is 16% better than the national average.
  • The pollution index in Keystone is 85% better than the national average.

Compare Keystone, CO Weather To Other Cities

Keystone 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.
IndexKeystoneColoradoNational
Air quality index423850
Pollution index736,4312,034,6195,066,862

Keystone air quality information

MeasurementTotal
Days measured363
Days with good air quality296
Days with moderate air quality63
Days w/ poor A.Q. for sensitive groups4
Days with unhealthy air quality

Keystone air quality information

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

Average monthly Keystone temperature with heat index

Keystone monthly precipitation with daily maximum

Keystone monthly snow depth with daily maximum

Keystone monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Copper Mountain, CO2924216%
Georgetown, CO1,1434216%
Aetna Estates, CO1,3664216%
Dillon, CO9924216%
Montezuma, CO754216%
Keystone, CO8774216%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Crab Orchard, KY8773334%
Mashpee Neck, MA8773334%
Bellaire, MI8773628%
Kimball, MN8773334%
Hardin, IL8776020%
Keystone, CO8774216%
Source: The Keystone, 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.
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