Roscoe Weather Forecast

    • 62
    • 70

    Rain Showers

    • 53
    • 66

    Rain Showers Likely

    • 48
    • 63

    Chance Rain Showers

    • 47
    • 61

    Slight Chance Rain Showers

    • 48
    • 63

    Mostly Cloudy

    • 50
    • 66

    Mostly Cloudy

    • 49
    • 69

    Partly Sunny

Today 19 Sep Winnebago

Partly cloudy. Highs around 70.

Tonight 19 Sep Winnebago

Showers and a chance of Thunderstorms. Some Thunderstorms may produce heavy rainfall early in the evening. Some Thunderstorms may produce heavy rainfall in the late evening and overnight. Lows in the lower 60s. Northeast Winds 5 to 10 Mph. Chance of precipitation near 100 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

    67.5 °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

    40.4 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.2 °F
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