Tri-Cities Airport Weather Forecast

    • 56
    • 87

    Increasing Clouds

    • 50
    • 79

    Rain Showers Likely

    • 45
    • 73

    Chance Rain Showers

    • 47
    • 73

    Chance Rain Showers

    • 49
    • 77

    Slight Chance Rain Showers

    • 50
    • 80

    Chance Rain Showers

    • 49
    • 77

    Chance Rain Showers

Today 1 Sep Lower Columbia Basin of Washington

Mostly cloudy. Highs in the mid to upper 80s. South wind 5 to 10 Mph.

Tonight 1 Sep Lower Columbia Basin of Washington

Partly cloudy. Lows in the mid to upper 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)

  • Lowest

  • Average September

  • Highest

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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