Portland Weather Forecast

    • 57
    • 80

    Becoming Sunny

    • 59
    • 87

    Mostly Sunny

    • 66
    • 89

    Partly Sunny

    • 65
    • 92

    Slight Chance Thunderstorms

    • 64
    • 91

    Slight Chance Thunderstorms

    • 62
    • 88

    Partly Sunny

Today 10 Sep Whiteside

Sunny. Highs in the lower 80s. Southeast Winds around 5 Mph.

Tonight 10 Sep Whiteside

Mostly clear. Lows in the upper 50s. Northeast Winds around 5 Mph.

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  • Temperature Real-Time

Portland Temperature Statistics

September Temperature

Sterling Rockfalls (16.8 miles)

  • Lowest 7 September, 2025

    41 °F

  • Average September

    59.9 °F

  • Highest 2 September, 2025

    80.1 °F

Climate (2020–Present)

Sterling Rockfalls (16.8 miles)

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  • Average Low 2020–2025

    41.6 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    61.5 °F
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