Grinnell Regional Airport Weather Forecast

    • 47
    • 68

    Becoming Sunny

    • 55
    • 82

    Partly Sunny

    • 32
    • 70

    Chance Rain Showers

    • 29
    • 49

    Chance Rain/Snow

    • 34
    • 46

    Chance Rain

    • 41
    • 60

    Rain Likely

Today 29 Mar Poweshiek

Mostly sunny. Highs in the upper 60s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 29 Mar Poweshiek

Partly cloudy and not as cool. Near steady temperature in the upper 30s. South Winds around 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grinnell Regional Airport Temperature Statistics

March Temperature

Newton Municipal Airport - Earl Johnson Field (14.9 miles)

  • Lowest 16 March, 2026

    8.6 °F

  • Average March

    45.1 °F

  • Highest 21 March, 2026

    91.4 °F

Climate (2021–Present)

Newton Municipal Airport - Earl Johnson Field (14.9 miles)

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  • Average Low 2021–2026

    41.6 °F

  • Average 2021–2026

    51.5 °F

  • Average High 2021–2026

    61.5 °F
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