Tri-Cities Airport Weather Forecast

    • 54
    • 87

    Gradual Clearing

    • 47
    • 78

    Rain Showers Likely

    • 43
    • 72

    Chance Rain Showers

    • 44
    • 73

    Chance Rain Showers

    • 46
    • 76

    Partly Sunny

    • 48
    • 78

    Chance Rain Showers

Today 1 Sep Lower Columbia Basin of Washington

Mostly cloudy. Highs in the mid to upper 80s. Light Wind, becoming southwest 5 to 10 Mph in the afternoon.

Tonight 1 Sep Lower Columbia Basin of Washington

Mostly clear in the Evening, becoming mostly cloudy. Lows in the 50s. Southwest wind 5 to 15 Mph with Gusts to around 25 Mph.

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Tri-Cities Airport Temperature Statistics

September Temperature

Tri-Cities Airport (0 miles)

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  • Average September

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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

    68 °F
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