Mount Rainier Weather Forecast

    • 40
    • 50

    Mostly Sunny

    • 41
    • 55

    Partly Sunny

    • 38
    • 41

    Partly Sunny

    • 35
    • 43

    Slight Chance Thunderstorms

    • 31
    • 37

    Slight Chance Snow Showers

    • 31
    • 35

    Slight Chance Snow Showers

Today 2 Sep Cascades of Pierce and Lewis Counties

Sunny. Areas of smoke until late afternoon. Haze through the day. Freezing level near 15500 feet.

Tonight 2 Sep Cascades of Pierce and Lewis Counties

Clear in the evening then becoming partly cloudy. Haze. Freezing level near 15000 feet.

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Mount Rainier Temperature Statistics

September Temperature

Stampede Pass (34.8 miles)

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  • Average September

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Climate (2020–Present)

Stampede Pass (34.8 miles)

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  • Average Low 2020–2025

    36.2 °F

  • Average 2020–2025

    41.5 °F

  • Average High 2020–2025

    48.3 °F
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