Archer Mountain Weather Forecast

    • 44
    • 54

    Rain Showers Likely

    • 48
    • 60

    Partly Sunny

    • 47
    • 63

    Mostly Sunny

    • 50
    • 62

    Partly Sunny

    • 50
    • 58

    Chance Rain

    • 50
    • 61

    Chance Rain

    • 46
    • 56

    Chance Rain

Today 25 Sep South Washington Cascades

Mostly cloudy with a chance of rain Showers with a slight chance of Thunderstorms. Snow level 6000 feet. West wind 15 to 20 Mph with Gusts up to 40 Mph. Chance of rain 50 percent. Rainfall Amounts a tenth to a quarter of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 25 Sep South Washington Cascades

Mostly cloudy. A chance of rain Showers in the evening. Patchy fog after midnight. Snow level 5000 feet. Northwest wind 5 to 10 Mph. Chance of rain 50 percent. Rainfall Amounts less than a tenth of an inch.

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Archer Mountain Temperature Statistics

September Temperature

Portland, Portland-Troutdale Airport (14.9 miles)

  • Lowest 16 September, 2026

    47.6 °F

  • Average September

    62.9 °F

  • Highest 9 September, 2026

    88.6 °F

Climate (2021–2026)

Portland, Portland-Troutdale Airport (14.9 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    56.2 °F

  • Average High 2021–2026

    65.2 °F
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