Grinnell Regional Airport Weather Forecast

    • 20
    • 29

    Mostly Cloudy

    • 30
    • 35

    Partly Sunny

    • 33
    • 47

    Mostly Cloudy

    • 30
    • 50

    Mostly Sunny

    • 37
    • 52

    Partly Sunny

    • 32
    • 51

    Chance Rain

Today 3 Jan Poweshiek

Mostly cloudy. Highs in the upper 20s. Northwest Winds around 5 Mph.

Tonight 3 Jan Poweshiek

Mostly cloudy in the Evening, then becoming partly cloudy. Lows around 20. North Winds around 5 Mph, becoming east after midnight.

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Grinnell Regional Airport Temperature Statistics

January Temperature

Newton Municipal Airport - Earl Johnson Field (14.9 miles)

  • Lowest 1 January, 2026

    14 °F

  • Average January

    21.6 °F

  • Highest 1 January, 2026

    28.4 °F

Climate (2021–Present)

Newton Municipal Airport - Earl Johnson Field (14.9 miles)

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  • Average Low 2021–2026

    41.5 °F

  • Average 2021–2026

    51.2 °F

  • Average High 2021–2026

    61.1 °F
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