Ossian Weather Forecast

    • 1
    • 28

    Snow Likely

    • 8
    • 14

    Partly Sunny

    • 5
    • 18

    Mostly Cloudy

    • 12
    • 21

    Mostly Cloudy

    • 17
    • 29

    Partly Sunny

    • 14
    • 27

    Mostly Cloudy

Today 31 Dec Winneshiek

Snow likely. Snow accumulation around an inch. Highs in the upper 20s. Temperature falling to around 19 in the afternoon. Northwest Winds 10 to 15 Mph. Chance of snow 70 percent.

Tonight 31 Dec Winneshiek

Partly cloudy. Much Colder with Lows around 1 above. North Winds 5 to 10 Mph.

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Ossian Temperature Statistics

December Temperature

Decorah (9.3 miles)

  • Lowest 14 December, 2025

    -9.4 °F

  • Average December

    21.5 °F

  • Highest 18 December, 2025

    41 °F

Climate (2020–Present)

Decorah (9.3 miles)

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  • Average Low 2020–2025

    39.4 °F

  • Average 2020–2025

    48.1 °F

  • Average High 2020–2025

    56.6 °F
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