Ossian Weather Forecast

    • 50
    • 79

    Chance Thunderstorms

    • 33
    • 62

    Chance Thunderstorms

    • 30
    • 41

    Wintry Mix

    • 31
    • 40

    Rain Showers

    • 38
    • 51

    Rain Showers

    • 29
    • 45

    Chance Rain/Snow

    • 28
    • 45

    Partly Sunny

Today 30 Mar Winneshiek

Mostly sunny. Highs in the mid 70s. South Winds 10 to 15 Mph.

Tonight 30 Mar Winneshiek

Mostly cloudy this Evening, then becoming partly cloudy. A slight chance of Showers. A slight chance of Thunderstorms after midnight. Lows around 50. Southwest Winds 5 to 10 Mph. Chance of rain 20 percent.

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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

    39.6 °F

  • Highest 21 March, 2026

    80.6 °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

    56.8 °F
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