Koch Airport Weather Forecast

    • 16
    • 25

    Chance Snow

    • 1
    • 25

    Chance Snow

    • -9
    • 7

    Chance Snow

    • -7
    • 6

    Cold

    • 11
    • 21

    Mostly Cloudy

    • 25
    • 31

    Mostly Cloudy

Today 11 Dec Winnebago

Mostly cloudy. Highs in the mid 20s. West Winds around 5 Mph, becoming southwest in the afternoon.

Tonight 11 Dec Winnebago

Cloudy. A chance of snow until early morning. Total snow accumulation around half an inch. Lows around 17. East Winds around 5 Mph. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Koch Airport Temperature Statistics

December Temperature

Janesville-Rock County (13.7 miles)

  • Lowest 4 December, 2025

    -5.8 °F

  • Average December

    17.7 °F

  • Highest 3 December, 2025

    32 °F

Climate (2020–Present)

Janesville-Rock County (13.7 miles)

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  • Average Low 2020–2025

    40.4 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    60.3 °F
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