Grinnell Regional Airport Weather Forecast

    • 4
    • 25

    Snow

    • -12
    • 8

    Snow

    • -6
    • 4

    Cold

    • 14
    • 29

    Partly Sunny

    • 27
    • 37

    Mostly Cloudy

    • 27
    • 43

    Mostly Cloudy

Today 12 Dec Poweshiek

Mostly cloudy. Highs in the mid 20s. Northwest Winds 5 to 10 Mph.

Tonight 12 Dec Poweshiek

Cloudy. A chance of snow after midnight. Little or no snow accumulation. Lows around 4 above. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of snow 40 percent.

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  • Temperature Real-Time

Grinnell Regional Airport Temperature Statistics

December Temperature

Newton Municipal Airport - Earl Johnson Field (14.9 miles)

  • Lowest 4 December, 2025

    -5.8 °F

  • Average December

    20.6 °F

  • Highest 9 December, 2025

    46.4 °F

Climate (2020–Present)

Newton Municipal Airport - Earl Johnson Field (14.9 miles)

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  • Average Low 2020–2025

    41.5 °F

  • Average 2020–2025

    51.2 °F

  • Average High 2020–2025

    61.1 °F
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