Grinnell Weather Forecast

    • 73
    • 96

    Chance Thunderstorms

    • 70
    • 89

    Rain Showers Likely

    • 69
    • 86

    Chance Thunderstorms

    • 64
    • 82

    Chance Rain Showers

    • 64
    • 82

    Mostly Sunny

    • 66
    • 87

    Chance Rain Showers

Today 5 Jul Poweshiek

Sunny. Hot and humid. High in the mid 90s. Southwest wind 5 to 10 Mph. Heat index Readings 102 to 107.

Tonight 5 Jul Poweshiek

Partly cloudy in the evening then becoming mostly cloudy. A 50 percent chance of Thunderstorms. Low in the lower 70s. Southwest wind 5 to 10 Mph shifting to the northeast after midnight. Highest heat index Readings 102 to 107 through midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grinnell Temperature Statistics

July Temperature

Newton Municipal Airport - Earl Johnson Field (15.5 miles)

  • Lowest 2 July, 2022

    57.2 °F
  • Average July

    73 °F
  • Highest 3 July, 2022

    86 °F

Climate (2010–Present)

Newton Municipal Airport - Earl Johnson Field (15.5 miles)

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  • Average Low 2010–Present

    40.6 °F
  • Average 2010–Present

    49.9 °F
  • Average High 2010–Present

    59.3 °F
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