Roscoe Weather Forecast

    • 73
    • 91

    Slight Chance Thunderstorms

    • 60
    • 85

    Partly Sunny

    • 57
    • 82

    Partly Sunny

    • 60
    • 82

    Partly Sunny

    • 70
    • 87

    Chance Thunderstorms

    • 62
    • 88

    Slight Chance Thunderstorms

    • 56
    • 80

    Partly Sunny

Today 4 Sep Winnebago

Partly cloudy. A slight chance of Showers and Thunderstorms early in the afternoon. Highs in the lower 90s. South Winds 10 to 15 Mph. Chance of precipitation 20 percent. Heat index Values up to 100.

Tonight 4 Sep Winnebago

Partly cloudy. A slight chance of Showers and Thunderstorms in the late evening and early morning. Patchy fog late. Humid with Lows in the lower 70s. West Winds around 5 Mph. Chance of precipitation 20 percent.

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Roscoe Temperature Statistics

September Temperature

Janesville-Rock County (14.3 miles)

  • Lowest 1 September, 2026

    69.8 °F

  • Average September

    77.5 °F

  • Highest 1 September, 2026

    91.4 °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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