Grinnell Regional Airport Weather Forecast

    • 34
    • 45

    Mostly Cloudy

    • 30
    • 46

    Partly Sunny

    • 34
    • 54

    Mostly Sunny

    • 33
    • 47

    Mostly Cloudy

    • 27
    • 43

    Chance Rain/Snow

    • 18
    • 34

    Slight Chance Snow

Today 5 Jan Poweshiek

Partly sunny in the Morning, then becoming mostly cloudy. Patchy fog in the morning. Highs in the mid 40s. Southwest Winds around 5 Mph, becoming southeast in the afternoon.

Tonight 5 Jan Poweshiek

Mostly cloudy. Patchy fog. Lows in the mid 30s. Southeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grinnell Regional Airport Temperature Statistics

January Temperature

Newton Municipal Airport - Earl Johnson Field (14.9 miles)

  • Lowest 1 January, 2026

    14 °F

  • Average January

    22.5 °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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