Effigy Mounds National Monument Weather Forecast

    • 7
    • 34

    Partly Sunny

    • 17
    • 28

    Partly Sunny

    • 30
    • 40

    Mostly Cloudy

    • 25
    • 41

    Mostly Cloudy

    • 34
    • 45

    Mostly Cloudy

    • 29
    • 51

    Mostly Cloudy

Today 20 Dec Clayton

Mostly cloudy this Morning, then clearing. Not as cold with Highs in the lower 30s. Temperature falling into the upper 20s this afternoon. West Winds 10 to 15 Mph.

Tonight 20 Dec Clayton

Clear. Lows around 8 above. Northwest Winds 10 to 15 Mph.

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Effigy Mounds National Monument Temperature Statistics

December Temperature

Prairie Du Chien Municipal Airport (5.6 miles)

  • Lowest 14 December, 2025

    -4.7 °F

  • Average December

    19 °F

  • Highest 16 December, 2025

    41.2 °F

Climate (2020–Present)

Prairie Du Chien Municipal Airport (5.6 miles)

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  • Average Low 2020–2025

    40.3 °F

  • Average 2020–2025

    49.7 °F

  • Average High 2020–2025

    59.2 °F
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