Ossian Weather Forecast

    • 58
    • 64

    Chance Rain Showers

    • 55
    • 65

    Mostly Cloudy

    • 54
    • 63

    Chance Rain Showers

    • 53
    • 65

    Mostly Cloudy

    • 56
    • 68

    Chance Rain Showers

    • 57
    • 66

    Rain Showers Likely

Today 24 Sep Winneshiek

Mostly cloudy. Highs in the mid 60s. Light Winds.

Tonight 24 Sep Winneshiek

Cloudy with a 50 percent chance of Showers. Lows in the upper 50s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ossian Temperature Statistics

September Temperature

Decorah (9.3 miles)

  • Lowest 13 September, 2026

    48.2 °F

  • Average September

    66.9 °F

  • Highest 4 September, 2026

    87.8 °F

Climate (2021–2026)

Decorah (9.3 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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