Tri-Cities Airport Weather Forecast

    • 52
    • 79

    Increasing Clouds

    • 43
    • 73

    Rain Showers Likely

    • 42
    • 68

    Partly Sunny

    • 41
    • 70

    Partly Sunny

    • 43
    • 71

    Partly Sunny

    • 44
    • 72

    Partly Sunny

Today 24 Sep Lower Columbia Basin of Washington

Partly cloudy. Highs in the upper 70s. Light wind.

Tonight 24 Sep Lower Columbia Basin of Washington

Mostly cloudy. A 50 percent chance of rain Showers overnight. Lows in the lower to mid 50s. Light wind. Gusts up to 20 Mph overnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tri-Cities Airport Temperature Statistics

September Temperature

Tri-Cities Airport (0 miles)

  • Lowest 8 September, 2026

    44.7 °F

  • Average September

    65.1 °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

    68 °F
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