Portland International Jetport Weather Forecast

    • 45
    • 64

    Partly Sunny

    • 44
    • 64

    Partly Sunny

    • 44
    • 64

    Chance Rain Showers

    • 49
    • 65

    Chance Rain Showers

    • 48
    • 67

    Chance Rain Showers

Today 22 Sep Coastal Cumberland

Partly sunny. Highs in the mid 60s. Northeast Winds around 10 Mph.

Tonight 22 Sep Coastal Cumberland

Partly cloudy in the Evening, then clearing. Lows in the lower 40s. Light and variable Winds, becoming north around 10 Mph after midnight.

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Portland International Jetport Temperature Statistics

September Temperature

Portland, Portland International Jetport (0 miles)

  • Lowest 20 September, 2026

    41 °F

  • Average September

    63.4 °F

  • Highest 10 September, 2026

    85.6 °F

Climate (2021–2026)

Portland, Portland International Jetport (0 miles)

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  • Average Low 2021–2026

    40 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    57.3 °F
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