Lake Bryan Weather Forecast

    • 58
    • 89

    Increasing Clouds

    • 51
    • 76

    Rain Showers

    • 49
    • 78

    Mostly Sunny

    • 51
    • 87

    Sunny

    • 51
    • 89

    Mostly Sunny

    • 45
    • 80

    Partly Sunny

    • 46
    • 81

    Mostly Sunny

Today 13 Sep Foothills of the Blue Mountains of Washington

Sunny. Highs in the mid to upper 80s. Southwest wind 5 to 10 Mph.

Tonight 13 Sep Foothills of the Blue Mountains of Washington

Partly cloudy. Lows in the mid to upper 50s. South wind 5 to 10 Mph.

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Lake Bryan Temperature Statistics

September Temperature

Walla Walla Regional Airport (36 miles)

  • Lowest 10 September, 2025

    62.1 °F

  • Average September

    79 °F

  • Highest 2 September, 2025

    97 °F

Climate (2020–Present)

Walla Walla Regional Airport (36 miles)

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  • Average Low 2020–2025

    45.1 °F

  • Average 2020–2025

    54.6 °F

  • Average High 2020–2025

    64.1 °F
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