Grinnell Regional Airport Weather Forecast

    • 52
    • 68

    Becoming Sunny

    • 56
    • 76

    Chance Rain Showers

    • 49
    • 70

    Rain Showers

    • 50
    • 71

    Rain Showers

    • 51
    • 64

    Rain Showers Likely

    • 52
    • 66

    Mostly Cloudy

    • 49
    • 66

    Rain Showers Likely

Today 27 Oct Poweshiek

Showers likely. Highs in the lower 60s. Chance of rain 60 percent.

Tonight 27 Oct Poweshiek

Cloudy, then becoming partly cloudy this Evening, then becoming mostly clear. Lows in the lower 50s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grinnell Regional Airport Temperature Statistics

October Temperature

Newton Municipal Airport - Earl Johnson Field (14.9 miles)

  • Lowest 17 October, 2026

    32 °F

  • Average October

    61.1 °F

  • Highest 11 October, 2026

    87.8 °F

Climate (2021–2026)

Newton Municipal Airport - Earl Johnson Field (14.9 miles)

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  • Average Low 2021–2026

    41.5 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    61.4 °F
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