TODAY MAY30
TEMPERATURE66
HUMIDITY54
PRESSURE30.26
WIND COND.10 9.2
  • 7258Sun
  • 8368Mon20%
  • 9270Tue30%
  • 8563Wed30%40%
  • 8465Thu30%30%
daynightWeather update from Waterloo, Waterloo Municipal Airport at
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Janesville 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°F29°F19°F1.3"
February11°F33°F22°F1.2"
March25°F49°F36°F1.9"
April36°F63°F49°F5.0"
May47°F74°F60°F4.8"
June58°F83°F71°F6.5"
July61°F86°F74°F4.9"
August58°F84°F71°F4.0"
September51°F79°F64°F3.4"
October39°F65°F51°F3.2"
November27°F50°F38°F1.8"
December14°F33°F23°F2.1"

Did you know?

  • The highest monthly average temperature in Janesville for July is 74 degrees.
  • The lowest monthly average temperature in Janesville for January is 19 degrees.
  • The most monthly precipitation in Janesville occurs in June with 6.5 inches.
  • The air quality index in Janesville is 14% better than the national average.
  • The pollution index in Janesville is 80% better than the national average.

Compare Janesville, IA Weather To Other Cities

      vs

      Janesville 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.
      IndexJanesvilleIowaNational
      Air quality index433950
      Pollution index1,013,9601,643,8365,066,862

      Janesville air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality240
      Days with moderate air quality122
      Days w/ poor A.Q. for sensitive groups3
      Days with unhealthy air quality

      Janesville air quality information

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

      Average monthly Janesville temperature with heat index

      Janesville monthly precipitation with daily maximum

      Janesville monthly snow depth with daily maximum

      Janesville monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Denver, IA1,8144314%
      Hudson, IA2,4144314%
      Readlyn, IA8434314%
      Waterloo, IA68,3574314%
      Dike, IA1,3094314%
      Janesville, IA7954314%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Newton, UT795476%
      Faulkton, SD7952648%
      Schaller, IA7954118%
      Arkport, NY7953040%
      Puako, HI795142184%
      Janesville, IA7954314%
      Source: The Janesville, 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.