Tri-Cities Airport Weather Forecast

    • 46
    • 64

    Rain Showers Likely

    • 45
    • 74

    Increasing Clouds

    • 46
    • 72

    Mostly Cloudy

    • 48
    • 79

    Mostly Sunny

    • 49
    • 82

    Mostly Sunny

    • 50
    • 83

    Mostly Sunny

    • 50
    • 84

    Mostly Sunny

Today 13 Sep Lower Columbia Basin of Washington

Rain Showers likely. Highs in the lower to mid 60s. Southwest wind 5 to 15 Mph with Gusts to around 30 Mph. Chance of precipitation 70 percent. Rainfall Amounts less than a tenth of an inch.

Tonight 13 Sep Lower Columbia Basin of Washington

Cloudy with a 50 percent chance of rain Showers in the Evening, then partly cloudy overnight. Lows in the mid to upper 40s. Southwest wind 5 to 15 Mph with Gusts to around 25 Mph. Rainfall Amounts less than a tenth of an inch.

Graph Plots Open in Graphs

  • 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

    66.1 °F

  • Highest 10 September, 2026

    89.1 °F

Climate (2021–2026)

Tri-Cities Airport (0 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    42.8 °F

  • Average 2021–2026

    55.4 °F

  • Average High 2021–2026

    67.9 °F
Get WillyWeather+ to remove ads