Tri-Cities Airport Weather Forecast

    • 53
    • 85

    Mostly Sunny

    • 55
    • 92

    Chance Thunderstorms

    • 45
    • 78

    Partly Sunny

    • 43
    • 73

    Partly Sunny

    • 45
    • 76

    Mostly Sunny

    • 51
    • 82

    Mostly Sunny

    • 54
    • 88

    Mostly Sunny

Today 27 May Lower Columbia Basin of Washington

Sunny. Highs in the lower to mid 80s. North wind 5 to 10 Mph.

Tonight 27 May Lower Columbia Basin of Washington

Mostly clear. Lows in the lower to mid 50s. Northeast wind 5 to 10 Mph in the Evening, becoming light.

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Tri-Cities Airport Temperature Statistics

May Temperature

Tri-Cities Airport (0 miles)

  • Lowest 18 May, 2026

    37.7 °F

  • Average May

    64.2 °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

    55.7 °F

  • Average High 2021–2026

    68.1 °F
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