Twin Sisters Lake Weather Forecast

    • 46
    • 60

    Rain Showers Likely

    • 48
    • 66

    Chance Thunderstorms

    • 49
    • 71

    Mostly Sunny

    • 46
    • 69

    Mostly Sunny

    • 44
    • 66

    Mostly Sunny

    • 45
    • 66

    Mostly Sunny

    • 46
    • 67

    Mostly Sunny

Today 21 Jul Upper Slopes of the Eastern Washington Cascades Crest

Mostly cloudy. A chance of rain Showers in the Morning, then a chance of Showers and Thunderstorms in the afternoon. Highs in the upper 50s to upper 60s. Chance of precipitation 50 percent. Rainfall Amounts up to a half of an inch Possible, except higher Amounts possible in Thunderstorms.

Tonight 21 Jul Upper Slopes of the Eastern Washington Cascades Crest

Mostly cloudy. A 50 percent chance of rain Showers in the evening. Lows in the mid 40s to lower 50s. Rainfall Amounts less than a tenth of an inch.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Twin Sisters Lake Temperature Statistics

July Temperature

Stampede Pass (36.7 miles)

  • Lowest 3 July, 2025

    44.1 °F

  • Average July

    58.5 °F

  • Highest 1 July, 2025

    78.1 °F

Climate (2020–Present)

Stampede Pass (36.7 miles)

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  • Average Low 2020–2025

    36.2 °F

  • Average 2020–2025

    41.5 °F

  • Average High 2020–2025

    48.4 °F
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