TODAY DEC08
TEMPERATURE44
HUMIDITY74
PRESSURE
WIND COND.329 1
  • 3825Mon
  • 3930Tue20%
  • 4030Wed
  • 4336Thu
  • 4535Fri
daynightWeather update from PIERCE 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
January19°F47°F31°Fn/a
February25°F51°F37°Fn/a
March30°F58°F43°Fn/a
April31°F63°F47°Fn/a
May40°F70°F55°Fn/a
June48°F80°F65°Fn/a
July56°F90°F74°Fn/a
August51°F86°F70°Fn/a
September47°F79°F63°Fn/a
October34°F68°F50°Fn/a
November28°F55°F40°Fn/a
December19°F44°F30°Fn/a

Did you know?

  • The highest monthly average temperature in Janesville for July is 74 degrees.
  • The lowest monthly average temperature in Janesville for December is 30 degrees.
  • The most monthly precipitation in Janesville occurs in January with 0 inches.
  • The air quality index in Janesville is 1% worse than the national average.
  • The pollution index in Janesville is 64% better than the national average.

Compare Janesville, CA 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.
IndexJanesvilleCaliforniaNational
Air quality index505550
Pollution index1,799,83018,106,7265,066,862

Janesville air quality information

MeasurementTotal
Days measured365
Days with good air quality185
Days with moderate air quality148
Days w/ poor A.Q. for sensitive groups14
Days with unhealthy air quality4

Janesville air quality information

PollutantTotal
Arsenic0.010%
Benzene0.030%
Carbon Tetrachloride0.000%
Lead0.010%
Mercury0.004%

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.
Johnstonville, CA1,18350= 100
Litchfield, CA14350= 100
Milford, CA14550= 100
Susanville, CA15,55550= 100
Janesville, CA1,28350= 100

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Sheffield, IA1,2831864%
Clarkton, MO1,2833628%
Gillett, WI1,2834020%
Pinebluff, NC1,2843726%
Comer, GA1,2843922%
Janesville, CA1,28350= 100
Source: The Janesville, CA 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.
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