Donnellson Weather Forecast

    • 75
    • 90

    Partly Sunny

    • 75
    • 94

    Mostly Sunny

    • 72
    • 91

    Chance Thunderstorms

    • 71
    • 85

    Chance Thunderstorms

    • 73
    • 89

    Slight Chance Thunderstorms

    • 74
    • 92

    Mostly Sunny

    • 74
    • 94

    Slight Chance Thunderstorms

Today 22 Jul Lee

Mostly sunny. A slight chance of Showers and Thunderstorms this afternoon. Hot with Highs around 90. Southeast Winds around 10 Mph. Chance of rain 20 percent. Heat index Values up to 101.

Tonight 22 Jul Lee

Partly cloudy. A slight chance of Showers and Thunderstorms this evening. Humid with Lows in the mid 70s. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 102 early this evening.

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Donnellson Temperature Statistics

July Temperature

Fort Madison Municipal Airport (12.4 miles)

  • Lowest 1 July, 2025

    64.4 °F

  • Average July

    76.4 °F

  • Highest 11 July, 2025

    91.4 °F

Climate (2020–Present)

Fort Madison Municipal Airport (12.4 miles)

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  • Average Low 2020–2025

    45.4 °F

  • Average 2020–2025

    54.7 °F

  • Average High 2020–2025

    64.2 °F
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