Harpers Ferry Weather Forecast

    • 60
    • 75

    Mostly Cloudy

    • 59
    • 77

    Chance Rain Showers

    • 63
    • 74

    Rain Showers

    • 59
    • 79

    Rain Showers Likely

    • 55
    • 68

    Chance Rain Showers

    • 54
    • 65

    Chance Rain Showers

    • 53
    • 68

    Mostly Cloudy

Today 16 Sep Allamakee

Partly cloudy. Lows in the lower 50s. Highs in the lower 70s.

Tonight 16 Sep Allamakee

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms after midnight. Lows around 60. East Winds around 5 Mph. Chance of rain 50 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Harpers Ferry Temperature Statistics

September Temperature

Prairie Du Chien Municipal Airport (12.4 miles)

  • Lowest 14 September, 2026

    47.3 °F

  • Average September

    70.8 °F

  • Highest 4 September, 2026

    90.7 °F

Climate (2021–2026)

Prairie Du Chien Municipal Airport (12.4 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    40.5 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    59.5 °F
Get WillyWeather+ to remove ads