Harrison Weather Forecast

    • 65
    • 82

    Partly Sunny

    • 72
    • 84

    Partly Sunny

    • 74
    • 93

    Mostly Sunny

    • 71
    • 93

    Chance Thunderstorms

    • 68
    • 88

    Chance Thunderstorms

    • 68
    • 87

    Chance Thunderstorms

Today 21 Jul Winnebago

Partly cloudy. Highs in the lower 80s. East Winds 5 to 10 Mph.

Tonight 21 Jul Winnebago

Mostly clear early in the Evening, then becoming partly cloudy. Lows in the mid 60s. Southeast Winds 5 to 10 Mph.

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Harrison Temperature Statistics

July Temperature

Janesville-Rock County (14.9 miles)

  • Lowest 18 July, 2025

    50 °F

  • Average July

    70.5 °F

  • Highest 3 July, 2025

    89.6 °F

Climate (2020–Present)

Janesville-Rock County (14.9 miles)

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  • Average Low 2020–2025

    40.5 °F

  • Average 2020–2025

    48.8 °F

  • Average High 2020–2025

    60.3 °F
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