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Key findings

  • The highest monthly average temperature in Grand Lake for July is 74.7 degrees
  • The lowest monthly average temperature in Grand Lake for December is 29.7 degrees
  • The most monthly precipitation in Grand Lake occurs in November with 2.6 inches
  • The air quality index in Grand Lake is 5% better than the national average
  • The pollution index in Grand Lake is 89% better than the national average

Compare Grand Lake, CO Weather

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      Grand Lake 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"

      Grand Lake 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.
      IndexGrand LakeColoradoNational
      Air quality index473850
      Pollution index543,6682,034,6195,066,862

      Grand Lake 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

      Grand Lake air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.180%
      Mercury0.030%

      Average monthly Grand Lake temperature with heat index

      Grand Lake monthly precipitation with daily maximum

      Grand Lake monthly snow depth with daily maximum

      Grand Lake monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Hot Sulphur Springs, CO799476%
      Granby, CO1,722476%
      Grand Lake, CO205476%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Stella, NE2054314%
      Exeland, WI2053432%
      Farson, WY205468%
      Round Mountain, TX2054412%
      Nicolaus, CA2054412%
      Grand Lake, CO205476%
      Source: The Grand Lake, 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.