TODAY MAR01
TEMPERATURE50
HUMIDITY50
PRESSURE101190
WIND COND.180 38.9
  • 6449Sat
  • 7035Sun20%
  • 5424Mon30%20%
  • 4726Tue
  • 4930Wed
daynightWeather update from Forest City Municipal Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Crystal Lake for July is 72.5 degrees
  • The lowest monthly average temperature in Crystal Lake for January is 16.7 degrees
  • The most monthly precipitation in Crystal Lake occurs in June with 5.4 inches
  • The air quality index in Crystal Lake is 64% better than the national average
  • The pollution index in Crystal Lake is 71% better than the national average

Compare Crystal Lake, IA Weather

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      Crystal 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
      January9°F25°F17°F0.7"
      February11°F29°F20°F1.1"
      March25°F44°F34°F2.2"
      April36°F60°F47°F5.1"
      May48°F71°F59°F5.0"
      June58°F81°F69°F5.4"
      July61°F84°F72°F4.2"
      August59°F82°F70°F4.0"
      September51°F76°F62°F4.3"
      October38°F62°F49°F2.7"
      November26°F47°F36°F1.5"
      December13°F29°F21°F1.4"

      Crystal 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.
      IndexCrystal LakeIowaNational
      Air quality index153942
      Pollution index784,9241,154,5352,726,193

      Crystal Lake air quality information

      MeasurementTotal
      Days measured118
      Days with good air quality118
      Days with moderate air quality0
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Crystal Lake air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.002%
      Mercury0.000%

      Average monthly Crystal Lake temperature with heat index

      Crystal Lake monthly precipitation with daily maximum

      Crystal Lake monthly snow depth with daily maximum

      Crystal Lake monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Forest City, IA4,1171570.0%
      Lake Mills, IA2,1081570.0%
      Hutchins, IA311570.0%
      Wesley, IA4511570.0%
      Buffalo Center, IA9691570.0%
      Crystal Lake, IA2641570.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Industry, CA2647244.0%
      Bliss, ID2642060.0%
      Sweetwater, ID2642942.0%
      Fenton, LA2644510.0%
      Grand Cane, LA2643922.0%
      Crystal Lake, IA2641570.0%
      Source: The Crystal Lake, IA 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.