Best year time to visit City of Janesville

General weather information about City of Janesville

Average annual temperature is 10.4 °C

Absolute maximum temperature: 36.8 °C

Absolute minimum temperature: -26.4 °C

Number of sunny days: 181 days

Number of rainy days: 157 days

Number of snow days: 27 days

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

City of Janesville air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)9.310.619.525.532.432.533.036.833.627.618.212.8
Average daytime temperature (°C)1.43.46.415.222.827.728.527.824.115.88.35.4
Average temperature (°C)-2.3-2.01.28.915.721.122.922.119.011.63.72.0
Average night temperature (°C)-5.0-6.1-3.03.59.715.117.717.515.28.00.0-0.5
Absolute minimum temperature (°C)-26.4-22.9-13.5-2.60.57.113.010.08.2-2.7-12.2-8.1

City of 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)9.510.511.913.414.615.315.013.912.511.19.89.1
Daylight minimum duration (h)9.09.011.012.014.015.014.013.011.010.09.09.0
Sunshine mean duration (h)3.67.16.48.510.912.212.411.28.77.16.74.1
Precipitation (mm)6190981095027139521321045162
Sunny days121612142118161412112114
Rainy days1181215101215171818813
Snow days847100000214

City of Janesville - weather forecast by months

City of Janesville weather in januaryCity of Janesville weather in februaryCity of Janesville weather in marchCity of Janesville weather in aprilCity of Janesville weather in mayCity of Janesville weather in juneCity of Janesville weather in julyCity of Janesville weather in augustCity of Janesville weather in septemberCity of Janesville weather in octoberCity of Janesville weather in novemberCity of Janesville weather in december

Best time to visit City of Janesville:

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

  • May — 10.9(h)
  • June — 12.2(h)
  • July — 12.4(h)
  • August — 11.2(h)

Months with the longest average daylight duration in City of Janesville:

  • June — 15.3(h)

The largest precipitation sum in City of Janesville is at

  • April — 109(mm)
  • July — 139(mm)
  • September — 132(mm)
  • October — 104(mm)

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    Frequently asked questions

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