Ossian Weather Forecast

    • 34
    • 46

    Increasing Clouds

    • 40
    • 54

    Mostly Cloudy

    • 46
    • 64

    Mostly Cloudy

    • 27
    • 63

    Partly Sunny

    • 25
    • 42

    Mostly Sunny

    • 33
    • 50

    Partly Sunny

Today 23 Mar Winneshiek

Sunny. Highs in the upper 40s. Light Winds, becoming west around 5 Mph this afternoon.

Tonight 23 Mar Winneshiek

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the mid 30s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ossian Temperature Statistics

March Temperature

Decorah (9.3 miles)

  • Lowest 16 March, 2026

    8.6 °F

  • Average March

    37.5 °F

  • Highest 9 March, 2026

    68 °F

Climate (2021–Present)

Decorah (9.3 miles)

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  • Average Low 2021–2026

    39.5 °F

  • Average 2021–2026

    48.2 °F

  • Average High 2021–2026

    56.7 °F
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