Sugar River Forest Preserve Weather Forecast

    • 65
    • 81

    Severe Tstms

    • 64
    • 82

    Chance Thunderstorms

    • 61
    • 79

    Rain Showers Likely

    • 60
    • 76

    Rain Showers Likely

    • 64
    • 78

    Rain Showers Likely

    • 60
    • 78

    Slight Chance Rain Showers

Today 11 Aug Winnebago

Mostly cloudy. Showers and Thunderstorms, mainly in the morning. Some Thunderstorms may be severe until late afternoon. Locally heavy rainfall possible until late afternoon. Humid with Highs in the lower 80s. South Winds around 5 Mph. Chance of precipitation 80 percent.

Tonight 11 Aug Winnebago

Partly cloudy in the Evening, then becoming mostly cloudy. A slight chance of Showers and Thunderstorms after midnight. A chance of Showers and Thunderstorms late. Humid with Lows in the mid 60s. East Winds around 5 Mph in the Evening, becoming light and variable. Chance of precipitation 40 percent.

Graph Plots Open in Graphs

  • 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

    68.5 °F

  • Highest 4 August, 2026

    84.2 °F

Climate (2021–2026)

Janesville-Rock County (14.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    40.3 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.3 °F
Get WillyWeather+ to remove ads