Roscoe Weather Forecast

    • 61
    • 86

    Partly Sunny

    • 55
    • 85

    Slight Chance Thunderstorms

    • 48
    • 76

    Mostly Sunny

    • 53
    • 82

    Mostly Sunny

    • 51
    • 78

    Mostly Sunny

    • 52
    • 78

    Mostly Sunny

Today 26 May Winnebago

Partly cloudy. Highs in the mid 80s. Southwest Winds around 5 Mph.

Tonight 26 May Winnebago

Partly cloudy. Lows in the lower 60s. South Winds around 5 Mph in the Evening, becoming light and variable.

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Roscoe Temperature Statistics

May Temperature

Janesville-Rock County (14.3 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    54.4 °F

  • Highest 17 May, 2026

    84.2 °F

Climate (2021–Present)

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

    60.4 °F
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