Sugar River Forest Preserve Weather Forecast

    • 58
    • 77

    Rain Showers Likely

    • 59
    • 83

    Chance Thunderstorms

    • 64
    • 84

    Chance Thunderstorms

    • 64
    • 83

    Rain Showers Likely

    • 50
    • 81

    Chance Rain Showers

    • 44
    • 67

    Partly Sunny

Today 15 May Winnebago

Partly cloudy in the morning then clearing. Highs in the upper 70s. South Winds 15 to 20 Mph with Gusts up to 25 Mph.

Tonight 15 May Winnebago

Partly cloudy in the Evening, then becoming mostly cloudy. A chance of Thunderstorms after midnight. Showers likely after midnight. A slight chance of Thunderstorms late. Lows in the upper 50s. South Winds 10 to 15 Mph, becoming southwest 5 to 10 Mph after midnight. Chance of precipitation 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sugar River Forest Preserve Temperature Statistics

May Temperature

Janesville-Rock County (14.3 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    48.5 °F

  • Highest 4 May, 2026

    80.6 °F

Climate (2021–Present)

Janesville-Rock County (14.3 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.8 °F

  • Average High 2021–2026

    60.4 °F
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