Portland Weather Forecast

    • 68
    • 83

    Mostly Cloudy

    • 61
    • 79

    Rain Showers

    • 50
    • 77

    Partly Sunny

    • 57
    • 79

    Mostly Sunny

    • 59
    • 82

    Partly Sunny

    • 58
    • 79

    Chance Rain Showers

Today 8 Sep Ionia

Partly sunny. Highs in the lower 80s. Light Winds becoming south 5 to 10 Mph with Gusts to around 20 Mph in the afternoon.

Tonight 8 Sep Ionia

Partly cloudy. A 20 percent chance of Showers and Thunderstorms after midnight. Lows in the upper 60s. South Winds 5 to 10 Mph. Gusts up to 20 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Portland Temperature Statistics

September Temperature

Ionia County Airport (9.3 miles)

  • Lowest 6 September, 2026

    53.6 °F

  • Average September

    73.3 °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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