Roscoe Weather Forecast

    • 45
    • 61

    Mostly Cloudy

    • 50
    • 66

    Chance Rain Showers

    • 52
    • 72

    Slight Chance Thunderstorms

    • 53
    • 78

    Slight Chance Thunderstorms

    • 56
    • 82

    Partly Sunny

    • 59
    • 84

    Chance Rain Showers

Today 21 May Winnebago

Mostly cloudy. A slight chance of Sprinkles in the morning. Highs in the lower 60s. East Winds 10 to 15 Mph.

Tonight 21 May Winnebago

Mostly cloudy. Lows in the mid 40s. East Winds 10 to 15 Mph.

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  • Temperature Real-Time

Roscoe Temperature Statistics

May Temperature

Janesville-Rock County (14.3 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    54 °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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