Castalia Weather Forecast

    • 47
    • 66

    Rain Showers

    • 35
    • 55

    Chance Rain Showers

    • 39
    • 60

    Partly Sunny

    • 53
    • 63

    Chance Rain Showers

    • 55
    • 76

    Rain Showers Likely

    • 39
    • 63

    Chance Rain Showers

Today 24 Apr Winneshiek

Showers likely with a slight chance of Thunderstorms. Highs in the lower 60s. Northeast Winds 5 to 10 Mph, becoming east this afternoon. Chance of rain 60 percent.

Tonight 24 Apr Winneshiek

Showers likely with a chance of Thunderstorms in the Evening, then Showers with a slight chance of Thunderstorms after midnight. Lows in the mid 40s. Northeast Winds 5 to 10 Mph. Chance of rain 100 percent.

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Castalia Temperature Statistics

April Temperature

Decorah (11.8 miles)

  • Lowest 8 April, 2025

    19.4 °F

  • Average April

    43.6 °F

  • Highest 12 April, 2025

    66.2 °F

Climate (2020–Present)

Decorah (11.8 miles)

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  • Average Low 2020–2025

    39.2 °F

  • Average 2020–2025

    47.9 °F

  • Average High 2020–2025

    56.4 °F
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