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Key findings

  • The highest monthly average temperature in Granby for July is 74.7 degrees
  • The lowest monthly average temperature in Granby for December is 29.7 degrees
  • The most monthly precipitation in Granby occurs in November with 2.6 inches
  • The air quality index in Granby is 5% better than the national average
  • The pollution index in Granby is 81% better than the national average

Compare Granby, CO Weather

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      Granby 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
      January18°F48°F32°F1.2"
      February21°F50°F34°F1.5"
      March30°F62°F44°F1.6"
      April36°F66°F49°F0.2"
      May43°F73°F57°F2.4"
      June54°F89°F71°F1.1"
      July59°F92°F75°F2.1"
      August56°F90°F72°F1.1"
      September49°F82°F64°F0.2"
      October38°F69°F52°F2.1"
      November28°F58°F41°F2.6"
      December17°F46°F30°F0.7"

      Granby 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.
      IndexGranbyColoradoNational
      Air quality index473850
      Pollution index963,1532,034,6195,066,862

      Granby air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality227
      Days with moderate air quality133
      Days w/ poor A.Q. for sensitive groups5
      Days with unhealthy air quality0

      Granby air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.020%
      Carbon Tetrachloride0.000%
      Lead0.003%
      Mercury0.000%

      Average monthly Granby temperature with heat index

      Granby monthly precipitation with daily maximum

      Granby monthly snow depth with daily maximum

      Granby monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Hot Sulphur Springs, CO799476%
      Fraser, CO1,400476%
      Tabernash, CO430476%
      Parshall, CO43476%
      Winter Park, CO585476%
      Granby, CO1,722476%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      East Brooklyn, CT1,7223334%
      East Millinocket, ME1,7223138%
      Harwich Port, MA1,7213628%
      Bayou L'Ourse, LA1,7214118%
      John Day, OR1,7212060%
      Granby, CO1,722476%
      Source: The Granby, 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.