Best year time to visit Janesville

General weather information about Janesville

Average annual temperature is 10.8 °C

Absolute maximum temperature: 38.3 °C

Absolute minimum temperature: -28.4 °C

Number of sunny days: 205 days

Number of rainy days: 137 days

Number of snow days: 23 days

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* Weather data for Janesville United States is based on climate observations for 2026 year

Janesville air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)7.910.421.926.531.232.133.838.334.731.417.813.0
Average daytime temperature (°C)-0.13.16.615.924.328.628.328.726.717.19.96.1
Average temperature (°C)-4.3-2.81.09.517.622.722.823.420.512.34.61.5
Average night temperature (°C)-7.5-7.4-3.44.211.316.917.318.615.58.30.5-1.4
Absolute minimum temperature (°C)-28.4-25.5-17.9-4.30.88.411.312.29.1-5.0-13.4-7.5

Janesville monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.510.611.913.414.615.315.013.912.511.19.89.1
Daylight minimum duration (h)9.09.011.012.014.015.014.013.011.010.09.09.0
Sunshine mean duration (h)4.26.97.49.111.812.212.311.49.96.97.14.3
Precipitation (mm)52449255632577634372834
Sunny days171915171916121814172318
Rainy days77101112141913161369
Snow days726200000114

Janesville - weather forecast by months

Janesville weather in januaryJanesville weather in februaryJanesville weather in marchJanesville weather in aprilJanesville weather in mayJanesville weather in juneJanesville weather in julyJanesville weather in augustJanesville weather in septemberJanesville weather in octoberJanesville weather in novemberJanesville weather in december

Best time to visit Janesville:

The best time to visit Janesville during the most sunny months:

  • May — 11.8(h)
  • June — 12.2(h)
  • July — 12.3(h)
  • August — 11.4(h)

Months with the longest average daylight duration in Janesville:

  • June — 15.3(h)

The largest precipitation sum in Janesville is at

  • March — 92(mm)
  • July — 77(mm)
  • October — 72(mm)

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    Frequently asked questions

    When is the best time to visit Janesville?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Janesville.
    What is the weather like in Janesville?
    See average temperature, rainfall and daylight hours for Janesville by month in the table above.
    How many sunny days does Janesville have?
    The monthly weather statistics above show sunshine and rainfall patterns for Janesville throughout the year.