Lake Sacajawea Weather Forecast

    • 50
    • 77

    Becoming Sunny

    • 50
    • 79

    Mostly Sunny

    • 53
    • 84

    Mostly Sunny

    • 55
    • 87

    Mostly Sunny

    • 53
    • 85

    Partly Sunny

    • 45
    • 76

    Slight Chance Rain Showers

Today 20 May Lower Columbia Basin of Washington

Mostly cloudy in the morning then clearing. Highs in the mid to upper 70s. West wind 5 to 10 Mph.

Tonight 20 May Lower Columbia Basin of Washington

Partly cloudy. Lows in the upper 40s to lower 50s. Northwest wind 5 to 10 Mph. Gusts up to 20 Mph overnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Sacajawea Temperature Statistics

May Temperature

Tri-Cities Airport (18.6 miles)

  • Lowest 1 May, 2026

    38.6 °F

  • Average May

    63.7 °F

  • Highest 2 May, 2026

    90.6 °F

Climate (2021–Present)

Tri-Cities Airport (18.6 miles)

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  • Average Low 2021–2026

    43.1 °F

  • Average 2021–2026

    55.6 °F

  • Average High 2021–2026

    68.1 °F
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