Twin Sisters Lake Weather Forecast

    • 43
    • 63

    Increasing Clouds

    • 42
    • 65

    Mostly Sunny

    • 48
    • 73

    Mostly Sunny

    • 50
    • 75

    Mostly Sunny

    • 48
    • 75

    Chance Rain Showers

    • 46
    • 68

    Mostly Sunny

    • 50
    • 75

    Mostly Sunny

Today 11 Jul Upper Slopes of the Eastern Washington Cascades Crest

Sunny. Highs in the lower 60s to lower 70s.

Tonight 11 Jul Upper Slopes of the Eastern Washington Cascades Crest

Mostly clear in the Evening, becoming mostly cloudy. Lows in the 40s. West wind 5 to 15 Mph with Gusts to around 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Twin Sisters Lake Temperature Statistics

July Temperature

Stampede Pass (36.7 miles)

  • Lowest 1 July, 2026

    39 °F

  • Average July

    54.3 °F

  • Highest 6 July, 2026

    77 °F

Climate (2021–2026)

Stampede Pass (36.7 miles)

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  • Average Low 2021–2026

    36.2 °F

  • Average 2021–2026

    41.5 °F

  • Average High 2021–2026

    48.3 °F
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