Mount Rainier Weather Forecast

    • 16
    • 34

    Breezy

    • 21
    • 28

    Mostly Cloudy

    • 17
    • 25

    Snow Showers

    • 16
    • 23

    Chance Snow

    • 21
    • 31

    Mostly Sunny

    • 25
    • 35

    Mostly Sunny

Today 10 Sep Cascades of Pierce and Lewis Counties

Mostly cloudy. Freezing level near 13500 feet.

Tonight 10 Sep Cascades of Pierce and Lewis Counties

Partly cloudy in the evening then becoming mostly cloudy. Freezing level near 11000 feet.

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Mount Rainier Temperature Statistics

September Temperature

Stampede Pass (34.8 miles)

  • Lowest 3 September, 2026

    39.9 °F

  • Average September

    47 °F

  • Highest 1 September, 2026

    61 °F

Climate (2021–2026)

Stampede Pass (34.8 miles)

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  • Average Low 2021–2026

    36.1 °F

  • Average 2021–2026

    41.5 °F

  • Average High 2021–2026

    48.2 °F
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