Portland Weather Forecast

    • 43
    • 67

    Mostly Sunny

    • 51
    • 76

    Mostly Cloudy

    • 49
    • 78

    Mostly Sunny

    • 55
    • 80

    Partly Sunny

    • 59
    • 78

    Chance Rain Showers

    • 58
    • 81

    Slight Chance Rain Showers

Today 7 Sep Traill

Sunny. Highs in the mid 60s. South Winds 5 to 15 Mph.

Tonight 7 Sep Traill

Mostly clear. Lows in the mid 40s. South Winds 5 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Portland Temperature Statistics

September Temperature

Grand Forks, Grand Forks International Airport (32.3 miles)

  • Lowest 4 September, 2025

    37.9 °F

  • Average September

    55.4 °F

  • Highest 1 September, 2025

    82.9 °F

Climate (2020–Present)

Grand Forks, Grand Forks International Airport (32.3 miles)

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  • Average Low 2020–2025

    31.8 °F

  • Average 2020–2025

    42.7 °F

  • Average High 2020–2025

    53.4 °F
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