Decatur City Weather Forecast

    • 61
    • 79

    Chance Thunderstorms

    • 59
    • 78

    Chance Rain Showers

    • 62
    • 77

    Mostly Cloudy

    • 61
    • 82

    Chance Rain Showers

    • 58
    • 82

    Slight Chance Thunderstorms

    • 56
    • 78

    Slight Chance Rain Showers

Today 18 Sep Decatur

Mostly cloudy in the Morning, then becoming partly sunny. A chance of Showers. A slight chance of Thunderstorms in the Morning, then a chance of Thunderstorms in the afternoon. Humid with Highs in the lower 80s. South Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 18 Sep Decatur

Mostly cloudy with a slight chance of Showers and Thunderstorms. Near steady temperature in the mid 60s. South Winds around 5 Mph. Chance of rain 20 percent.

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Decatur City Temperature Statistics

September Temperature

Lamoni, Lamoni Municipal Airport (8.1 miles)

  • Lowest 7 September, 2025

    43 °F

  • Average September

    67.9 °F

  • Highest 12 September, 2025

    93.9 °F

Climate (2020–Present)

Lamoni, Lamoni Municipal Airport (8.1 miles)

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  • Average Low 2020–2025

    43.2 °F

  • Average 2020–2025

    53.1 °F

  • Average High 2020–2025

    63.1 °F
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