Fort Atkinson Weather Forecast

    • 25
    • 29

    Slight Chance Snow

    • 29
    • 38

    Mostly Cloudy

    • 25
    • 37

    Mostly Cloudy

    • 34
    • 38

    Cloudy

    • 29
    • 43

    Mostly Cloudy

    • 26
    • 38

    Mostly Cloudy

    • 16
    • 37

    Mostly Cloudy

Today 21 Dec Winneshiek

Mostly sunny. Near steady temperature in the upper 20s. South Winds 5 to 10 Mph.

Tonight 21 Dec Winneshiek

Mostly cloudy. A chance of freezing rain with a slight chance of snow after midnight. Not as cool with Lows in the mid 20s. South Winds 5 to 10 Mph. Chance of precipitation 30 percent.

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Fort Atkinson Temperature Statistics

December Temperature

Decorah (13.7 miles)

  • Lowest 14 December, 2025

    -9.4 °F

  • Average December

    17.1 °F

  • Highest 18 December, 2025

    41 °F

Climate (2020–Present)

Decorah (13.7 miles)

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  • Average Low 2020–2025

    39.3 °F

  • Average 2020–2025

    48 °F

  • Average High 2020–2025

    56.5 °F
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