Lake Sacajawea Weather Forecast

    • 62
    • 84

    Mostly Cloudy

    • 58
    • 80

    Slight Chance Rain Showers

    • 61
    • 87

    Mostly Sunny

    • 63
    • 94

    Sunny

    • 63
    • 97

    Hot

    • 60
    • 94

    Mostly Sunny

Today 20 Jul Lower Columbia Basin of Washington

Mostly cloudy. Highs in the lower to mid 80s. Southwest wind 5 to 15 Mph.

Tonight 20 Jul Lower Columbia Basin of Washington

Cloudy. Lows in the lower to mid 60s. Southwest wind 5 to 10 Mph.

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Lake Sacajawea Temperature Statistics

July Temperature

Tri-Cities Airport (18.6 miles)

  • Lowest 6 July, 2025

    52.6 °F

  • Average July

    77.4 °F

  • Highest 13 July, 2025

    104.6 °F

Climate (2020–Present)

Tri-Cities Airport (18.6 miles)

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  • Average Low 2020–2025

    42.8 °F

  • Average 2020–2025

    55.5 °F

  • Average High 2020–2025

    67.9 °F
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