Janesville Weather Forecast

    • 60
    • 77

    Thunderstorms Likely

    • 60
    • 71

    Rain Showers

    • 48
    • 70

    Rain Showers Likely

    • 55
    • 74

    Chance Thunderstorms

    • 51
    • 72

    Chance Thunderstorms

    • 46
    • 70

    Chance Rain Showers

Today 27 Apr Rock

Warmer, breezy. Mostly cloudy. A 50 percent chance of light Showers and Thunderstorms in the afternoon. Highs in the upper 70s. Southwest Winds 15 to 25 Mph.

Tonight 27 Apr Rock

Rain Showers and Thunderstorms likely until early Morning, then rain Showers likely and chance of Thunderstorms early in the morning. Lows around 60. Southwest Winds 10 to 15 Mph shifting to the southeast 5 to 10 Mph after midnight. Chance of precipitation 70 percent.

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Janesville Temperature Statistics

April Temperature

Janesville-Rock County (4.3 miles)

  • Lowest 6 April, 2024

    28.4 °F

  • Average April

    47.5 °F

  • Highest 14 April, 2024

    82.4 °F

Climate (2019–Present)

Janesville-Rock County (4.3 miles)

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  • Average Low 2019–2024

    40.7 °F

  • Average 2019–2024

    48.8 °F

  • Average High 2019–2024

    59.9 °F
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