Tri-Cities Airport Weather Forecast

    • 48
    • 80

    Becoming Sunny

    • 48
    • 77

    Partly Sunny

    • 51
    • 78

    Chance Rain Showers

    • 44
    • 72

    Rain Showers Likely

    • 43
    • 67

    Partly Sunny

    • 43
    • 68

    Partly Sunny

Today 22 Sep Lower Columbia Basin of Washington

Mostly cloudy in the Morning, becoming partly cloudy. Highs in the upper 70s to lower 80s. Southwest wind 5 to 10 Mph. Gusts up to 20 Mph in the afternoon.

Tonight 22 Sep Lower Columbia Basin of Washington

Mostly clear. Lows in the upper 40s to lower 50s. Southwest wind 5 to 10 Mph. Gusts up to 20 Mph in the evening.

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  • Temperature Real-Time

Tri-Cities Airport Temperature Statistics

September Temperature

Tri-Cities Airport (0 miles)

  • Lowest 8 September, 2026

    44.7 °F

  • Average September

    65 °F

  • Highest 10 September, 2026

    90.6 °F

Climate (2021–2026)

Tri-Cities Airport (0 miles)

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  • Average Low 2021–2026

    42.8 °F

  • Average 2021–2026

    55.4 °F

  • Average High 2021–2026

    67.9 °F
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