Portland Weather Forecast

    • 63
    • 90

    Increasing Clouds

    • 62
    • 84

    Chance Thunderstorms

    • 62
    • 84

    Chance Rain Showers

    • 62
    • 85

    Chance Rain Showers

    • 60
    • 84

    Chance Rain Showers

    • 57
    • 82

    Slight Chance Rain Showers

Today 18 Sep Whiteside

Mostly sunny. Hot with Highs around 90. Southeast Winds around 5 Mph.

Tonight 18 Sep Whiteside

Partly cloudy in the Evening, then mostly cloudy with a slight chance of Showers after midnight. Lows in the lower 60s. East Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Portland Temperature Statistics

September Temperature

Sterling Rockfalls (16.8 miles)

  • Lowest 7 September, 2025

    41 °F

  • Average September

    64.5 °F

  • Highest 14 September, 2025

    91 °F

Climate (2020–Present)

Sterling Rockfalls (16.8 miles)

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  • Average Low 2020–2025

    41.6 °F

  • Average 2020–2025

    51.6 °F

  • Average High 2020–2025

    61.6 °F
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