Roscoe Weather Forecast

    • 58
    • 70

    Rain Showers

    • 57
    • 72

    Rain Showers

    • 49
    • 66

    Rain Showers Likely

    • 46
    • 61

    Chance Rain Showers

    • 45
    • 61

    Mostly Cloudy

    • 45
    • 64

    Mostly Cloudy

Today 18 Sep Winnebago

Mostly cloudy. Isolated Showers late in the Morning, then scattered Showers in the late morning and early afternoon. Isolated Showers late. Highs in the lower 70s. East Winds 10 to 15 Mph. Chance of precipitation 40 percent.

Tonight 18 Sep Winnebago

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms in the Evening, then Showers with Thunderstorms likely after midnight. Locally heavy rainfall possible late. Lows in the upper 50s. East Winds 10 to 15 Mph. Chance of precipitation 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Roscoe Temperature Statistics

September Temperature

Janesville-Rock County (14.3 miles)

  • Lowest 14 September, 2026

    42.8 °F

  • Average September

    67.8 °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

    60.2 °F
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