Sugar River Forest Preserve Weather Forecast

    • 63
    • 80

    Slight Chance Thunderstorms

    • 60
    • 82

    Chance Thunderstorms

    • 57
    • 81

    Mostly Sunny

    • 60
    • 81

    Partly Sunny

    • 65
    • 81

    Chance Rain Showers

    • 68
    • 84

    Chance Rain Showers

Today 25 Aug Winnebago

Partly cloudy. Highs around 80. South Winds 5 to 10 Mph.

Tonight 25 Aug Winnebago

Mostly cloudy. A slight chance of Showers and Thunderstorms after midnight. Lows in the lower 60s. South Winds 5 to 10 Mph. Chance of precipitation 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sugar River Forest Preserve Temperature Statistics

August Temperature

Janesville-Rock County (14.3 miles)

  • Lowest 3 August, 2026

    53.6 °F

  • Average August

    68.7 °F

  • Highest 4 August, 2026

    84.2 °F

Climate (2021–2026)

Janesville-Rock County (14.3 miles)

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  • Average Low 2021–2026

    40.3 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.3 °F
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