Ossian Weather Forecast

    • 56
    • 77

    Sunny

    • 63
    • 78

    Chance Rain Showers

    • 53
    • 76

    Partly Sunny

    • 59
    • 70

    Rain Showers

    • 52
    • 77

    Rain Showers

    • 50
    • 66

    Mostly Cloudy

Today 10 Sep Winneshiek

Patchy fog this morning. Sunny. Highs in the upper 70s. Light Winds.

Tonight 10 Sep Winneshiek

Clear. Lows in the mid 50s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ossian Temperature Statistics

September Temperature

Decorah (9.3 miles)

  • Lowest 7 September, 2026

    62.6 °F

  • Average September

    73.4 °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

    56.5 °F
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