Janesville Weather Forecast

    • 45
    • 65

    Chance Rain Showers

    • 41
    • 62

    Chance Rain Showers

    • 44
    • 66

    Mostly Sunny

    • 49
    • 73

    Mostly Sunny

    • 51
    • 74

    Mostly Sunny

    • 55
    • 78

    Partly Sunny

Today 1 May Bremer

Mostly cloudy. A chance of Showers in the Morning, then a slight chance of Showers and Thunderstorms in the afternoon. Highs in the mid 60s. Northeast Winds around 5 Mph, becoming northwest in the afternoon. Chance of rain 40 percent.

Tonight 1 May Bremer

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms in the Evening, then partly cloudy after midnight. Lows in the mid 40s. Northwest Winds around 10 Mph. Chance of rain 30 percent.

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Janesville Temperature Statistics

May Temperature

Waterloo, Waterloo Municipal Airport (6.8 miles)

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Climate (2020–Present)

Waterloo, Waterloo Municipal Airport (6.8 miles)

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  • Average Low 2020–2025

    40.1 °F

  • Average 2020–2025

    50.9 °F

  • Average High 2020–2025

    61.5 °F
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