TODAY AUG16
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 8361Fri
  • 8563Sat
  • 8364Sun30%
  • 7758Mon60%50%
  • 7654Tue
daynightWeather update from Waterloo, Waterloo Municipal Airport at

Janesville Average Weather

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 13% better than the national average.
  • The pollution index in Janesville is 79% better than the national average.

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Compare Janesville, IA Weather To Other Cities

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.
Clarksville, IA1,2764314%
Evansdale, IA4,7944314%
Raymond, IA8294314%
Tripoli, IA1,3164314%
Denver, IA1,8144314%
Janesville, IA7954314%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Arkport, NY7953040%
Edgewood, IA7953236%
Faulkton, SD7952648%
Schaller, IA7954118%
North, SC7954216%
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.