Harpers Ferry Weather Forecast

    • 64
    • 85

    Chance Thunderstorms

    • 62
    • 84

    Chance Rain Showers

    • 60
    • 79

    Chance Thunderstorms

    • 61
    • 79

    Chance Rain Showers

    • 61
    • 80

    Chance Rain Showers

    • 57
    • 80

    Chance Rain Showers

    • 55
    • 77

    Partly Sunny

Today 17 Sep Allamakee

Partly sunny with a chance of Showers and Thunderstorms. Highs in the mid 80s. Light Winds. Chance of rain 50 percent.

Tonight 17 Sep Allamakee

Mostly cloudy with a chance of Showers and Thunderstorms. Lows in the lower 60s. Light Winds. Chance of rain 50 percent.

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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, 2025

    40.1 °F

  • Average September

    63.6 °F

  • Highest 14 September, 2025

    86.7 °F

Climate (2020–Present)

Prairie Du Chien Municipal Airport (12.4 miles)

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  • Average Low 2020–2025

    40.2 °F

  • Average 2020–2025

    49.6 °F

  • Average High 2020–2025

    59.1 °F
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