Portland Weather Forecast

    • 50
    • 65

    Chance Rain Showers

    • 46
    • 63

    Mostly Cloudy

    • 48
    • 63

    Mostly Cloudy

    • 46
    • 63

    Mostly Cloudy

    • 45
    • 65

    Partly Sunny

    • 43
    • 67

    Partly Sunny

    • 46
    • 70

    Partly Sunny

Today 20 Sep Ionia

Mostly sunny. Highs in the lower 70s.

Tonight 20 Sep Ionia

Partly cloudy. Lows around 50. Northeast Winds 10 to 15 Mph with Gusts to around 30 Mph.

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  • Temperature Real-Time

Portland Temperature Statistics

September Temperature

Ionia County Airport (9.3 miles)

  • Lowest 14 September, 2026

    42.8 °F

  • Average September

    67.8 °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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