Mount Rainier National Park Weather Forecast

    • 26
    • 32

    Snow

    • 26
    • 32

    Snow Showers

    • 26
    • 38

    Partly Sunny

    • 29
    • 43

    Partly Sunny

    • 33
    • 45

    Partly Sunny

    • 35
    • 48

    Partly Sunny

Today 15 May Cascades of Pierce and Lewis Counties

A chance of Showers in the Morning, then Showers, snow Showers and a slight chance of Thunderstorms in the afternoon. Snow level near 4000 feet. Rainfall Amounts a tenth to a quarter of an inch Possible, except higher Amounts possible in Thunderstorms. Snow accumulation up to 2 Inches.

Tonight 15 May Cascades of Pierce and Lewis Counties

Snow Showers in the evening. Rain Showers and a slight chance of Thunderstorms. Snow Showers likely after midnight. Snow level near 4000 feet. Rainfall Amounts a quarter to a half inch Possible, except higher Amounts possible in Thunderstorms. Snow accumulation of 1 to 5 Inches.

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Mount Rainier National Park Temperature Statistics

May Temperature

Stampede Pass (31.1 miles)

  • Lowest 13 May, 2026

    36 °F

  • Average May

    51.5 °F

  • Highest 3 May, 2026

    71.1 °F

Climate (2021–Present)

Stampede Pass (31.1 miles)

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  • Average Low 2021–2026

    36.3 °F

  • Average 2021–2026

    41.6 °F

  • Average High 2021–2026

    48.4 °F
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