Gem Lake Weather Forecast

    • 29
    • 37

    Rain/Snow

    • 24
    • 33

    Snow Showers

    • 21
    • 26

    Mostly Cloudy

    • 26
    • 33

    Mostly Cloudy

    • 30
    • 38

    Mostly Cloudy

    • 33
    • 40

    Chance Rain/Snow

Today 25 Dec Cascades of Southern King County

Mostly cloudy. Patchy fog through the day. A chance of Showers in the morning. Rain Showers and snow Showers in the afternoon. Snow level near 4000 feet. Rainfall Amounts a tenth to a quarter of an inch possible. Snow accumulation up to 1 inch. Afternoon pass Temperatures in the mid 30s. East wind in the Passes around 10 Mph becoming southeast in the afternoon. Gusts to 20 Mph.

Tonight 25 Dec Cascades of Southern King County

Mostly cloudy with a chance of Showers in the Evening, then partly cloudy with a slight chance of Showers after midnight. Areas of fog in the evening. Widespread dense fog and dense freezing fog late in the evening. Widespread dense freezing fog and patchy dense fog in the morning. Snow level near 3500 feet. No snow accumulation. Light wind in the Passes.

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Gem Lake Temperature Statistics

December Temperature

Stampede Pass (14.9 miles)

  • Lowest 1 December, 2025

    23 °F

  • Average December

    34.2 °F

  • Highest 13 December, 2025

    51.1 °F

Climate (2020–Present)

Stampede Pass (14.9 miles)

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  • Average Low 2020–2025

    36.3 °F

  • Average 2020–2025

    41.6 °F

  • Average High 2020–2025

    48.3 °F
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