Janesville Weather Forecast

    • 53
    • 69

    Mostly Sunny

    • 44
    • 77

    Rain Showers

    • 25
    • 50

    Chance Rain/Snow

    • 29
    • 45

    Mostly Sunny

    • 43
    • 64

    Partly Sunny

    • 34
    • 68

    Partly Sunny

Today 13 Mar Bremer

Sunny. Highs in the upper 60s. Southeast Winds 10 to 15 Mph.

Tonight 13 Mar Bremer

Mostly clear in the Evening, then partly cloudy with a slight chance of Showers after midnight. Not as cool with Lows in the lower 50s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

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Janesville Temperature Statistics

March Temperature

Waterloo, Waterloo Municipal Airport (6.8 miles)

  • Lowest 2 March, 2025

    11.8 °F

  • Average March

    38.6 °F

  • Highest 10 March, 2025

    75 °F

Climate (2020–Present)

Waterloo, Waterloo Municipal Airport (6.8 miles)

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  • Average Low 2020–2025

    40 °F

  • Average 2020–2025

    50.8 °F

  • Average High 2020–2025

    61.3 °F
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