Grundy Center Municipal Airport Weather Forecast

    • 65
    • 79

    Mostly Cloudy

    • 67
    • 86

    Rain Showers

    • 57
    • 81

    Partly Sunny

    • 58
    • 79

    Sunny

    • 63
    • 82

    Chance Thunderstorms

    • 57
    • 79

    Partly Sunny

    • 58
    • 77

    Rain Showers Likely

Today 7 Sep Grundy

Partly sunny. Highs in the lower 80s. Southeast Winds 10 to 15 Mph.

Tonight 7 Sep Grundy

Mostly cloudy. Lows in the mid 60s. Southeast Winds 10 to 15 Mph.

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Grundy Center Municipal Airport Temperature Statistics

September Temperature

Marshalltown, Marshalltown Municipal Airport (16.8 miles)

  • Lowest 1 September, 2026

    69.7 °F

  • Average September

    81.7 °F

  • Highest 2 September, 2026

    93.7 °F

Climate (2021–2026)

Marshalltown, Marshalltown Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    39.8 °F

  • Average 2021–2026

    50.6 °F

  • Average High 2021–2026

    61.4 °F
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