Ionia Weather Forecast

    • 66
    • 88

    Rain Showers Likely

    • 48
    • 83

    Rain Showers

    • 39
    • 62

    Partly Sunny

    • 43
    • 63

    Partly Sunny

    • 50
    • 69

    Mostly Cloudy

    • 54
    • 73

    Slight Chance Rain Showers

Today 18 May Ionia

Mostly sunny with a slight chance of Showers and Thunderstorms in the Morning, then Showers likely and a chance of Thunderstorms in the afternoon. Highs in the upper 80s. Southwest Winds 10 to 20 Mph with Gusts to around 35 Mph. Chance of rain 70 percent.

Tonight 18 May Ionia

Showers likely and a chance of Thunderstorms in the Evening, then partly cloudy with a chance of Showers and Thunderstorms after midnight. Lows in the mid 60s. Southwest Winds 10 to 15 Mph with Gusts to around 30 Mph. Chance of rain 70 percent.

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Ionia Temperature Statistics

May Temperature

Ionia County Airport (3.1 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    50.5 °F

  • Highest 4 May, 2026

    77 °F

Climate (2021–Present)

Ionia County Airport (3.1 miles)

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  • Average Low 2021–2026

    40.9 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    59 °F
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