Grinnell Weather Forecast

    • 11
    • 20

    Increasing Clouds

    • 18
    • 40

    Decreasing Clouds

    • 21
    • 31

    Chance Snow

    • 26
    • 38

    Partly Sunny

    • 25
    • 54

    Mostly Sunny

    • 15
    • 36

    Partly Sunny

    • 17
    • 28

    Chance Snow

Today 23 Feb Poweshiek

Sunny. Highs in the lower 20s. Northwest Winds 5 to 10 Mph.

Tonight 23 Feb Poweshiek

Mostly clear this Evening, then becoming partly cloudy. Lows around 10 above. West Winds around 5 Mph, becoming south around 5 Mph this Evening, then increasing to 10 to 15 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grinnell Temperature Statistics

February Temperature

Newton Municipal Airport - Earl Johnson Field (15.5 miles)

  • Lowest 1 February, 2026

    8.6 °F

  • Average February

    34.6 °F

  • Highest 16 February, 2026

    68 °F

Climate (2021–Present)

Newton Municipal Airport - Earl Johnson Field (15.5 miles)

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  • Average Low 2021–2026

    41.6 °F

  • Average 2021–2026

    51.5 °F

  • Average High 2021–2026

    61.5 °F
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