Portland Weather Forecast

    • 58
    • 78

    Increasing Clouds

    • 60
    • 83

    Partly Sunny

    • 48
    • 77

    Partly Sunny

    • 58
    • 72

    Chance Rain Showers

    • 60
    • 81

    Rain Showers Likely

    • 57
    • 75

    Rain Showers Likely

Today 11 Sep Ionia

Sunny. Highs in the upper 70s. Southeast Winds around 5 Mph.

Tonight 11 Sep Ionia

Mostly clear. Lows in the upper 50s. Light Winds becoming south 5 to 10 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

    71.6 °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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