Effigy Mounds National Monument Weather Forecast

    • 45
    • 62

    Slight Chance Rain Showers

    • 49
    • 66

    Partly Sunny

    • 51
    • 66

    Mostly Cloudy

    • 49
    • 68

    Mostly Cloudy

    • 52
    • 65

    Chance Rain Showers

    • 54
    • 70

    Mostly Cloudy

Today 22 Sep Clayton

Mostly cloudy with a chance of Showers this Morning, then partly sunny this afternoon. Highs in the lower 60s. East Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 22 Sep Clayton

Partly cloudy. Lows in the mid 40s. Northeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Effigy Mounds National Monument Temperature Statistics

September Temperature

Prairie Du Chien Municipal Airport (5.6 miles)

  • Lowest 14 September, 2026

    47.3 °F

  • Average September

    69.4 °F

  • Highest 4 September, 2026

    90.7 °F

Climate (2021–2026)

Prairie Du Chien Municipal Airport (5.6 miles)

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  • Average Low 2021–2026

    40.5 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    59.5 °F
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