Decorah Weather Forecast

    • -13
    • 6

    Cold

    • -5
    • 4

    Cold

    • 12
    • 28

    Mostly Cloudy

    • 22
    • 36

    Mostly Cloudy

    • 30
    • 39

    Chance Rain/Snow

    • 5
    • 35

    Partly Sunny

Today 13 Dec Winneshiek

Cloudy with a chance of Flurries this Morning, then mostly sunny this afternoon. Much Colder with Highs around 4 above. Northwest Winds 10 to 15 Mph. Wind chill Values as low as 20 below.

Tonight 13 Dec Winneshiek

Partly cloudy. Cold with Lows around 12 below. Northwest Winds 10 to 15 Mph. Wind chill Values as low as 30 below after midnight.

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Decorah Temperature Statistics

December Temperature

Decorah (2.5 miles)

  • Lowest 4 December, 2025

    -5.8 °F

  • Average December

    18.4 °F

  • Highest 9 December, 2025

    37.4 °F

Climate (2020–Present)

Decorah (2.5 miles)

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  • Average Low 2020–2025

    39.4 °F

  • Average 2020–2025

    48.1 °F

  • Average High 2020–2025

    56.6 °F
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