Portland Weather Forecast

    • 49
    • 84

    Rain Showers

    • 40
    • 64

    Partly Sunny

    • 43
    • 63

    Partly Sunny

    • 51
    • 67

    Slight Chance Rain Showers

    • 53
    • 71

    Slight Chance Rain Showers

    • 55
    • 75

    Partly Sunny

Today 19 May Ionia

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

Tonight 19 May Ionia

Rain Showers likely and a chance of Thunderstorms in the evening. Lows in the upper 40s. West Winds 10 to 15 Mph with Gusts to around 30 Mph becoming northwest 5 to 10 Mph with Gusts to around 20 Mph after midnight. Chance of rain 60 percent.

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Portland Temperature Statistics

May Temperature

Ionia County Airport (9.3 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    51.5 °F

  • Highest 16 May, 2026

    80.6 °F

Climate (2021–Present)

Ionia County Airport (9.3 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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