Hononegah Forest Preserve Weather Forecast

    • 54
    • 75

    Mostly Cloudy

    • 54
    • 78

    Partly Sunny

    • 56
    • 81

    Mostly Sunny

    • 64
    • 85

    Mostly Cloudy

    • 63
    • 85

    Chance Thunderstorms

    • 58
    • 83

    Slight Chance Thunderstorms

Today 9 Sep Winnebago

Partly cloudy in the Morning, then becoming mostly cloudy. Highs in the mid 70s. South Winds 5 to 10 Mph.

Tonight 9 Sep Winnebago

Mostly cloudy. Lows in the mid 50s. Southeast Winds around 5 Mph.

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Hononegah Forest Preserve Temperature Statistics

September Temperature

Janesville-Rock County (12.4 miles)

  • Lowest 4 September, 2025

    41 °F

  • Average September

    55.6 °F

  • Highest 1 September, 2025

    77 °F

Climate (2020–Present)

Janesville-Rock County (12.4 miles)

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  • Average Low 2020–2025

    40.5 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    60.2 °F
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