Ossian Weather Forecast

    • 55
    • 80

    Mostly Sunny

    • 63
    • 80

    Partly Sunny

    • 67
    • 78

    Rain Showers Likely

    • 70
    • 86

    Chance Thunderstorms

    • 67
    • 85

    Chance Thunderstorms

    • 66
    • 83

    Chance Rain Showers

Today 27 Aug Winneshiek

Mostly sunny. Highs around 80. Northwest Winds around 5 Mph.

Tonight 27 Aug Winneshiek

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 50s. Light Winds.

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  • Temperature Real-Time

Ossian Temperature Statistics

August Temperature

Decorah (9.3 miles)

  • Lowest 23 August, 2026

    50 °F

  • Average August

    70.4 °F

  • Highest 12 August, 2026

    84.2 °F

Climate (2021–2026)

Decorah (9.3 miles)

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  • Average Low 2021–2026

    39 °F

  • Average 2021–2026

    47.7 °F

  • Average High 2021–2026

    56.3 °F
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