Postville Weather Forecast

    • 73
    • 88

    Decreasing Clouds

    • 67
    • 85

    Thunderstorms Likely

    • 64
    • 81

    Rain Showers Likely

    • 64
    • 81

    Chance Rain Showers

    • 63
    • 81

    Slight Chance Thunderstorms

    • 64
    • 81

    Slight Chance Rain Showers

Today 8 Aug Allamakee

Partly cloudy. Patchy fog this morning. Hot with Highs around 90. South Winds 10 to 15 Mph. Heat index Values up to 100 this afternoon.

Tonight 8 Aug Allamakee

Partly cloudy. A chance of Showers and Thunderstorms after midnight. Humid with Lows in the mid 70s. South Winds 10 to 15 Mph. Chance of rain 30 percent. Heat index Values up to 100 early in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Postville Temperature Statistics

August Temperature

Decorah (15.5 miles)

  • Lowest 1 August, 2025

    50 °F

  • Average August

    65.8 °F

  • Highest 5 August, 2025

    80.6 °F

Climate (2020–Present)

Decorah (15.5 miles)

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  • Average Low 2020–2025

    39.2 °F

  • Average 2020–2025

    47.9 °F

  • Average High 2020–2025

    56.4 °F
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