Grinnell Regional Airport Weather Forecast

    • 54
    • 70

    Chance Rain Showers

    • 54
    • 66

    Rain Showers

    • 45
    • 64

    Rain Showers

    • 32
    • 58

    Mostly Sunny

    • 41
    • 61

    Sunny

    • 48
    • 66

    Partly Sunny

    • 49
    • 69

    Partly Sunny

Today 13 Oct Poweshiek

Mostly sunny. Highs in the lower 70s.

Tonight 13 Oct Poweshiek

Mostly sunny Early, then becoming mostly cloudy. A slight chance of Showers and Thunderstorms this evening. A chance of Showers with a slight chance of Thunderstorms after midnight. Lows in the mid 50s. Northwest Winds around 5 Mph, becoming north after midnight. Chance of rain 40 percent.

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Grinnell Regional Airport Temperature Statistics

October Temperature

Newton Municipal Airport - Earl Johnson Field (14.9 miles)

  • Lowest 3 October, 2026

    44.6 °F

  • Average October

    64.3 °F

  • Highest 11 October, 2026

    87.8 °F

Climate (2021–2026)

Newton Municipal Airport - Earl Johnson Field (14.9 miles)

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  • Average Low 2021–2026

    41.5 °F

  • Average 2021–2026

    51.3 °F

  • Average High 2021–2026

    61.3 °F
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