Effigy Mounds National Monument Weather Forecast

    • 52
    • 74

    Rain Showers

    • 59
    • 72

    Rain Showers

    • 61
    • 77

    Rain Showers Likely

    • 64
    • 79

    Rain Showers Likely

    • 60
    • 79

    Chance Rain Showers

    • 56
    • 74

    Chance Rain Showers

Today 15 Sep Clayton

Cloudy. Showers with a chance of Thunderstorms this morning. Highs in the lower 70s. Southwest Winds 10 to 15 Mph, becoming northwest 5 to 10 Mph this afternoon. Chance of rain 90 percent.

Tonight 15 Sep Clayton

Mostly cloudy. Cooler with Lows in the lower 50s. North Winds around 5 Mph.

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  • Temperature Real-Time

Effigy Mounds National Monument Temperature Statistics

September Temperature

Prairie Du Chien Municipal Airport (5.6 miles)

  • Lowest 11 September, 2026

    54.5 °F

  • Average September

    72.9 °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

    59.6 °F
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