Tri-Cities Airport Weather Forecast

    • 44
    • 75

    Mostly Sunny

    • 48
    • 77

    Partly Sunny

    • 50
    • 79

    Mostly Sunny

    • 51
    • 81

    Partly Sunny

    • 53
    • 84

    Mostly Sunny

    • 54
    • 86

    Mostly Sunny

Today 18 May Lower Columbia Basin of Washington

Sunny. Highs in the lower to mid 70s. West wind 5 to 10 Mph.

Tonight 18 May Lower Columbia Basin of Washington

Mostly clear. Lows in the lower to mid 40s. West wind 5 to 10 Mph with Gusts to around 20 Mph.

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Tri-Cities Airport Temperature Statistics

May Temperature

Tri-Cities Airport (0 miles)

  • Lowest 1 May, 2026

    38.6 °F

  • Average May

    64.3 °F

  • Highest 2 May, 2026

    90.6 °F

Climate (2021–Present)

Tri-Cities Airport (0 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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