Roscoe Weather Forecast

    • 49
    • 63

    Mostly Cloudy

    • 46
    • 62

    Partly Sunny

    • 47
    • 64

    Partly Sunny

    • 48
    • 65

    Mostly Cloudy

    • 47
    • 67

    Mostly Cloudy

    • 50
    • 69

    Mostly Cloudy

Today 21 Sep Winnebago

Cloudy. A slight chance of Showers in the morning. Highs in the lower 60s. Northeast Winds 15 to 20 Mph, Diminishing to 10 to 15 Mph in the afternoon. Chance of precipitation 20 percent.

Tonight 21 Sep Winnebago

Mostly cloudy. A slight chance of Showers after midnight. Lows around 50. Northeast Winds 10 to 15 Mph. Chance of precipitation 20 percent.

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Roscoe Temperature Statistics

September Temperature

Janesville-Rock County (14.3 miles)

  • Lowest 14 September, 2026

    42.8 °F

  • Average September

    67.3 °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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