Calmar Weather Forecast

    • 30
    • 37

    Mostly Cloudy

    • 24
    • 37

    Mostly Cloudy

    • 34
    • 36

    Cloudy

    • 33
    • 42

    Mostly Cloudy

    • 29
    • 39

    Mostly Cloudy

    • 17
    • 40

    Mostly Cloudy

Today 22 Dec Winneshiek

Mostly cloudy this Morning, then becoming partly sunny. Highs in the upper 30s. South Winds 5 to 10 Mph.

Tonight 22 Dec Winneshiek

Mostly cloudy. Lows around 30. Light Winds, becoming west after midnight.

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Calmar Temperature Statistics

December Temperature

Decorah (9.3 miles)

  • Lowest 14 December, 2025

    -9.4 °F

  • Average December

    17.1 °F

  • Highest 18 December, 2025

    41 °F

Climate (2020–Present)

Decorah (9.3 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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