Grinnell Regional Airport Weather Forecast

    • 60
    • 79

    Increasing Clouds

    • 58
    • 82

    Slight Chance Thunderstorms

    • 58
    • 78

    Mostly Cloudy

    • 61
    • 79

    Chance Rain Showers

    • 69
    • 84

    Chance Thunderstorms

    • 73
    • 92

    Slight Chance Thunderstorms

Today 23 Jun Poweshiek

Partly sunny this Morning, then becoming mostly cloudy. Highs in the upper 70s. Southwest Winds around 5 Mph.

Tonight 23 Jun Poweshiek

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms after midnight. Lows in the upper 50s. South Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grinnell Regional Airport Temperature Statistics

June Temperature

Newton Municipal Airport - Earl Johnson Field (14.9 miles)

  • Lowest 20 June, 2026

    53.6 °F

  • Average June

    71.8 °F

  • Highest 9 June, 2026

    89.6 °F

Climate (2021–2026)

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

    61.6 °F
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