Grinnell Regional Airport Weather Forecast

    • 65
    • 86

    Becoming Sunny

    • 68
    • 88

    Rain Showers Likely

    • 66
    • 85

    Rain Showers Likely

    • 65
    • 85

    Chance Thunderstorms

    • 66
    • 86

    Slight Chance Thunderstorms

    • 67
    • 89

    Mostly Sunny

Today 7 Jul Poweshiek

Mostly sunny. Highs in the mid 80s. South Winds around 5 Mph.

Tonight 7 Jul Poweshiek

Mostly clear. Lows in the mid 60s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grinnell Regional Airport Temperature Statistics

July Temperature

Newton Municipal Airport - Earl Johnson Field (14.9 miles)

  • Lowest 2 July, 2026

    64.4 °F

  • Average July

    78.2 °F

  • Highest 1 July, 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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