Grinnell Weather Forecast

    • 32
    • 58

    Chance Rain

    • 42
    • 60

    Chance Rain

    • 49
    • 62

    Chance Thunderstorms

    • 56
    • 79

    Rain Likely

    • 40
    • 71

    Rain Likely

    • 30
    • 49

    Chance Rain/Snow

    • 28
    • 46

    Partly Sunny

Today 25 Mar Poweshiek

Mostly sunny. Highs in the mid 50s. Northwest Winds around 10 Mph.

Tonight 25 Mar Poweshiek

Mostly cloudy with a chance of rain Showers late this Evening, then mostly clear with a slight chance of rain Showers. Lows in the lower 30s. Northwest Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grinnell Temperature Statistics

March Temperature

Newton Municipal Airport - Earl Johnson Field (15.5 miles)

  • Lowest 2 March, 2025

    14 °F

  • Average March

    42.9 °F

  • Highest 14 March, 2025

    80.6 °F

Climate (2020–Present)

Newton Municipal Airport - Earl Johnson Field (15.5 miles)

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  • Average Low 2020–2025

    41.2 °F

  • Average 2020–2025

    50.9 °F

  • Average High 2020–2025

    60.8 °F
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