Harpers Ferry Weather Forecast

    • 56
    • 84

    Becoming Sunny

    • 55
    • 81

    Mostly Sunny

    • 63
    • 82

    Rain Showers Likely

    • 55
    • 81

    Partly Sunny

    • 60
    • 77

    Rain Showers Likely

    • 58
    • 83

    Rain Showers Likely

    • 54
    • 73

    Partly Sunny

Today 9 Sep Allamakee

Mostly sunny. Near steady temperature in the lower 80s. West Winds 5 to 10 Mph.

Tonight 9 Sep Allamakee

Mostly clear. Cooler with Lows in the mid 50s. Northwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Harpers Ferry Temperature Statistics

September Temperature

Prairie Du Chien Municipal Airport (12.4 miles)

  • Lowest 7 September, 2026

    60.4 °F

  • Average September

    75 °F

  • Highest 4 September, 2026

    90.7 °F

Climate (2021–2026)

Prairie Du Chien Municipal Airport (12.4 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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