Tri-Cities Airport Weather Forecast

    • 48
    • 77

    Mostly Sunny

    • 51
    • 80

    Mostly Cloudy

    • 51
    • 82

    Mostly Sunny

    • 52
    • 85

    Slight Chance Rain Showers

    • 48
    • 81

    Mostly Sunny

    • 49
    • 81

    Partly Sunny

Today 31 May Lower Columbia Basin of Washington

Sunny. Highs in the 70s. Southwest wind 5 to 10 Mph with Gusts to around 20 Mph.

Tonight 31 May Lower Columbia Basin of Washington

Mostly clear. Lows in the mid 40s to lower 50s. Southwest wind 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tri-Cities Airport Temperature Statistics

May Temperature

Tri-Cities Airport (0 miles)

  • Lowest 18 May, 2026

    37.7 °F

  • Average May

    64.6 °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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