Fort Madison Weather Forecast

    • 70
    • 86

    Thunderstorms Likely

    • 73
    • 89

    Chance Thunderstorms

    • 73
    • 91

    Chance Thunderstorms

    • 68
    • 87

    Chance Thunderstorms

    • 65
    • 81

    Partly Sunny

    • 67
    • 83

    Slight Chance Thunderstorms

Today 13 Aug Lee

Patchy dense fog this morning. Mostly cloudy with occasional Showers and Thunderstorms this Morning, then partly sunny with a chance of Showers and Thunderstorms this afternoon. Highs in the mid 80s. Southeast Winds 5 to 10 Mph. Chance of rain 90 percent. Heat index Values up to 101 this afternoon.

Tonight 13 Aug Lee

Partly cloudy with a chance of Showers and Thunderstorms in the Evening, then mostly cloudy with Showers and Thunderstorms likely after midnight. Humid with Lows around 70. East Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 70 percent.

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Fort Madison Temperature Statistics

August Temperature

Fort Madison Municipal Airport (1.9 miles)

  • Lowest 3 August, 2026

    60.8 °F

  • Average August

    74.8 °F

  • Highest 11 August, 2026

    89.6 °F

Climate (2021–2026)

Fort Madison Municipal Airport (1.9 miles)

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  • Average Low 2021–2026

    45.4 °F

  • Average 2021–2026

    54.9 °F

  • Average High 2021–2026

    64.7 °F
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