Roscoe Weather Forecast

    • 57
    • 73

    Slight Chance Rain Showers

    • 61
    • 73

    Rain Showers

    • 59
    • 79

    Rain Showers

    • 52
    • 67

    Chance Rain Showers

    • 49
    • 64

    Chance Rain Showers

    • 50
    • 65

    Mostly Cloudy

Today 17 Sep Winnebago

Patchy fog early in the morning. Showers and a slight chance of Thunderstorms early in the Morning, then a slight chance of Showers late in the morning. Highs in the mid 70s. Northeast Winds around 5 Mph. Chance of precipitation near 100 percent.

Tonight 17 Sep Winnebago

Mostly cloudy. Lows in the upper 50s. Northeast Winds around 5 Mph.

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Roscoe Temperature Statistics

September Temperature

Janesville-Rock County (14.3 miles)

  • Lowest 14 September, 2026

    42.8 °F

  • Average September

    68.1 °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

    40.3 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.3 °F
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