Decorah Municipal Airport Weather Forecast

    • 56
    • 64

    Chance Rain Showers

    • 56
    • 65

    Slight Chance Rain Showers

    • 54
    • 69

    Mostly Cloudy

    • 57
    • 66

    Rain Showers Likely

    • 56
    • 67

    Chance Rain Showers

    • 51
    • 66

    Chance Rain Showers

Today 26 Sep Winneshiek

Cloudy with a 50 percent chance of Showers. Near steady temperature in the lower 60s. Southeast Winds 5 to 10 Mph.

Tonight 26 Sep Winneshiek

Mostly cloudy. A slight chance of Showers this Evening, then a chance of Showers after midnight. Lows in the mid 50s. Southeast Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Decorah Municipal Airport Temperature Statistics

September Temperature

Decorah (0 miles)

  • Lowest 23 September, 2026

    46.4 °F

  • Average September

    66 °F

  • Highest 4 September, 2026

    87.8 °F

Climate (2021–2026)

Decorah (0 miles)

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  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    47.8 °F

  • Average High 2021–2026

    56.4 °F
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