Downtown (Kennewick) Weather Forecast

    • 69
    • 98

    Hot

    • 67
    • 92

    Mostly Cloudy

    • 64
    • 88

    Slight Chance Rain Showers

    • 60
    • 84

    Chance Rain Showers

    • 60
    • 79

    Chance Rain Showers

    • 59
    • 75

    Chance Rain Showers

Today 5 Sep Lower Columbia Basin of Washington

Sunny. Haze in the morning. Areas of smoke through the day. Highs in the mid to upper 90s. North wind 5 to 10 Mph.

Tonight 5 Sep Lower Columbia Basin of Washington

Partly cloudy. Areas of smoke through the night. Haze overnight. Lows in the mid to upper 60s. North wind 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Downtown (Kennewick) Temperature Statistics

September Temperature

Tri-Cities Airport (3.7 miles)

  • Lowest 3 September, 2025

    57.9 °F

  • Average September

    79.6 °F

  • Highest 2 September, 2025

    99 °F

Climate (2020–Present)

Tri-Cities Airport (3.7 miles)

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  • Average Low 2020–2025

    42.9 °F

  • Average 2020–2025

    55.4 °F

  • Average High 2020–2025

    67.9 °F
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