Manastash Lake Weather Forecast

    • 54
    • 70

    Mostly Sunny

    • 58
    • 74

    Sunny

    • 62
    • 79

    Partly Sunny

    • 61
    • 80

    Partly Sunny

    • 60
    • 80

    Mostly Sunny

    • 60
    • 79

    Mostly Sunny

Today 21 Aug Lower Slopes of the Eastern Washington Cascades Crest

Sunny. Highs in the mid 70s to mid 80s, except in the 80s Valleys. Light Wind, becoming southeast 5 to 10 Mph in the afternoon.

Tonight 21 Aug Lower Slopes of the Eastern Washington Cascades Crest

Mostly clear. Lows in the mid 50s to lower 60s. Light wind.

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Manastash Lake Temperature Statistics

August Temperature

Ellensburg, Ellensburg Bowers Field (19.3 miles)

  • Lowest 17 August, 2025

    52 °F

  • Average August

    71.8 °F

  • Highest 12 August, 2025

    98.7 °F

Climate (2020–Present)

Ellensburg, Ellensburg Bowers Field (19.3 miles)

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  • Average Low 2020–2025

    40.4 °F

  • Average 2020–2025

    51.4 °F

  • Average High 2020–2025

    62.8 °F
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