Tri-Cities Airport Weather Forecast

    • 48
    • 80

    Increasing Clouds

    • 52
    • 85

    Mostly Sunny

    • 53
    • 88

    Mostly Sunny

    • 53
    • 86

    Partly Sunny

    • 44
    • 79

    Slight Chance Rain Showers

    • 45
    • 71

    Slight Chance Rain Showers

Today 21 May Lower Columbia Basin of Washington

Sunny. Highs in the mid 70s to lower 80s. Northeast wind 5 to 10 Mph.

Tonight 21 May Lower Columbia Basin of Washington

Mostly cloudy in the evening then clearing. Lows in the upper 40s to lower 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 1 May, 2026

    38.6 °F

  • Average May

    63.7 °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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