Roscoe Weather Forecast

    • 54
    • 80

    Mostly Cloudy

    • 51
    • 77

    Mostly Cloudy

    • 50
    • 79

    Mostly Sunny

    • 57
    • 84

    Partly Sunny

    • 63
    • 87

    Slight Chance Thunderstorms

    • 63
    • 87

    Chance Thunderstorms

Today 31 May Winnebago

Mostly cloudy. Highs around 80. East Winds 5 to 10 Mph.

Tonight 31 May Winnebago

Mostly cloudy. A chance of Sprinkles in the late evening and overnight. Lows in the mid 50s. East Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Roscoe Temperature Statistics

May Temperature

Janesville-Rock County (14.3 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    56.2 °F

  • Highest 26 May, 2026

    87.8 °F

Climate (2021–Present)

Janesville-Rock County (14.3 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.4 °F
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