Grinnell Regional Airport Weather Forecast

    • 57
    • 79

    Chance Thunderstorms

    • 58
    • 80

    Rain Showers Likely

    • 54
    • 70

    Rain Showers

    • 54
    • 75

    Partly Sunny

    • 57
    • 77

    Chance Thunderstorms

    • 55
    • 77

    Mostly Sunny

    • 56
    • 78

    Slight Chance Thunderstorms

Today 19 Jun Poweshiek

Partly sunny with a chance of Showers and Thunderstorms. Near steady temperature in the upper 70s. West Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 19 Jun Poweshiek

Mostly cloudy with a chance of Showers and Thunderstorms this Evening, then partly cloudy after midnight. Lows in the mid 50s. West Winds 5 to 10 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 2 June, 2026

    55.4 °F

  • Average June

    72.8 °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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