Portland Weather Forecast

    • 60
    • 76

    Increasing Clouds

    • 61
    • 69

    Rain Likely

    • 54
    • 72

    Rain Showers

    • 39
    • 67

    Slight Chance Rain Showers

    • 41
    • 65

    Partly Sunny

    • 38
    • 66

    Mostly Sunny

    • 35
    • 61

    Mostly Sunny

Today 29 Sep Ionia

Sunny. Highs in the lower 60s.

Tonight 29 Sep Ionia

Mostly cloudy. Lows in the upper 50s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Portland Temperature Statistics

September Temperature

Ionia County Airport (9.3 miles)

  • Lowest 26 September, 2026

    39.2 °F

  • Average September

    64 °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

    49.9 °F

  • Average High 2021–2026

    59 °F
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