Sugar River Forest Preserve Weather Forecast

    • 63
    • 83

    Mostly Sunny

    • 66
    • 84

    Rain Showers Likely

    • 61
    • 73

    Rain Showers Likely

    • 56
    • 78

    Partly Sunny

    • 60
    • 80

    Mostly Sunny

    • 65
    • 82

    Mostly Sunny

    • 66
    • 84

    Chance Thunderstorms

Today 3 Aug Winnebago

Mostly sunny. Temperatures in the lower 80s. South Winds around 5 Mph.

Tonight 3 Aug Winnebago

Clear. Lows in the lower 60s. South Winds around 5 Mph.

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  • Temperature Real-Time

Sugar River Forest Preserve Temperature Statistics

August Temperature

Janesville-Rock County (14.3 miles)

  • Lowest 1 August, 2026

    62.6 °F

  • Average August

    65.5 °F

  • Highest 1 August, 2026

    69.8 °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

    60.4 °F
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