Grinnell Regional Airport Weather Forecast

    • 62
    • 79

    Slight Chance Rain Showers

    • 58
    • 80

    Mostly Sunny

    • 60
    • 81

    Mostly Sunny

    • 63
    • 83

    Partly Sunny

    • 61
    • 80

    Chance Rain Showers

    • 63
    • 81

    Slight Chance Thunderstorms

Today 1 Aug Poweshiek

Cloudy with a chance of Showers and Thunderstorms in the Morning, then partly sunny in the afternoon. Breezy with Highs in the upper 70s. North Winds 15 to 25 Mph with Gusts up to 35 Mph. Chance of rain 50 percent.

Tonight 1 Aug Poweshiek

Partly cloudy in the Evening, then becoming mostly clear. Humid with Lows in the lower 60s. North Winds 10 to 15 Mph with Gusts up to 25 Mph, Diminishing to around 5 Mph after midnight.

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Grinnell Regional Airport Temperature Statistics

August Temperature

Newton Municipal Airport - Earl Johnson Field (14.9 miles)

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Climate (2021–2026)

Newton Municipal Airport - Earl Johnson Field (14.9 miles)

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  • Average Low 2021–2026

    41.4 °F

  • Average 2021–2026

    51.3 °F

  • Average High 2021–2026

    61.4 °F
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