Tri-Cities Airport Weather Forecast

    • 41
    • 67

    Increasing Clouds

    • 38
    • 65

    Slight Chance Rain Showers

    • 41
    • 68

    Partly Sunny

    • 45
    • 73

    Partly Sunny

    • 47
    • 77

    Partly Sunny

    • 50
    • 80

    Mostly Sunny

Today 15 May Lower Columbia Basin of Washington

Sunny in the Morning, becoming mostly cloudy. Highs in the 60s. Windy. Southwest wind 15 to 25 Mph.

Tonight 15 May Lower Columbia Basin of Washington

Mostly cloudy. Lows in the upper 30s to lower 40s. Windy. Southwest wind 15 to 25 Mph with Gusts to around 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tri-Cities Airport Temperature Statistics

May Temperature

Tri-Cities Airport (0 miles)

  • Lowest 1 May, 2026

    38.6 °F

  • Average May

    65.8 °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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