Portland Weather Forecast

    • 53
    • 79

    Slight Chance Rain Showers

    • 54
    • 78

    Partly Sunny

    • 57
    • 79

    Partly Sunny

    • 68
    • 83

    Slight Chance Rain Showers

    • 61
    • 84

    Partly Sunny

    • 54
    • 76

    Partly Sunny

Today 5 Sep Ionia

Mostly cloudy in the morning then becoming mostly sunny. Patchy fog in the morning. A 30 percent chance of Showers. Highs in the upper 70s. Northeast Winds 5 to 10 Mph with Gusts to around 20 Mph.

Tonight 5 Sep Ionia

Mostly clear. Lows in the lower 50s. Northeast Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening.

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Portland Temperature Statistics

September Temperature

Ionia County Airport (9.3 miles)

  • Lowest 1 September, 2026

    68 °F

  • Average September

    77.7 °F

  • Highest 2 September, 2026

    93.2 °F

Climate (2021–2026)

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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