Roscoe Weather Forecast

    • 41
    • 64

    Partly Sunny

    • 46
    • 62

    Mostly Cloudy

    • 51
    • 64

    Rain Showers Likely

    • 52
    • 71

    Mostly Cloudy

    • 53
    • 77

    Partly Sunny

    • 56
    • 81

    Partly Sunny

Today 20 May Winnebago

Partly cloudy. Highs in the mid 60s. Northeast Winds around 10 Mph.

Tonight 20 May Winnebago

Partly cloudy. Lows in the lower 40s. East Winds 10 to 15 Mph, becoming northeast 5 to 10 Mph after midnight.

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Roscoe Temperature Statistics

May Temperature

Janesville-Rock County (14.3 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    53.4 °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

    40.4 °F

  • Average 2021–2026

    48.8 °F

  • Average High 2021–2026

    60.4 °F
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