Horn Rapids County Park Weather Forecast

    • 55
    • 77

    Mostly Cloudy

    • 52
    • 77

    Rain Showers Likely

    • 50
    • 68

    Slight Chance Rain Showers

    • 51
    • 71

    Mostly Sunny

    • 53
    • 74

    Mostly Sunny

    • 55
    • 77

    Sunny

Today 11 Sep Lower Columbia Basin of Washington

Partly cloudy in the morning then clearing. Highs in the 70s. Southwest wind 5 to 10 Mph.

Tonight 11 Sep Lower Columbia Basin of Washington

Mostly cloudy. Lows in the lower to mid 50s. Light wind.

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Horn Rapids County Park Temperature Statistics

September Temperature

Tri-Cities Airport (16.8 miles)

  • Lowest 8 September, 2026

    44.7 °F

  • Average September

    65.4 °F

  • Highest 9 September, 2026

    86 °F

Climate (2021–2026)

Tri-Cities Airport (16.8 miles)

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  • Average Low 2021–2026

    42.8 °F

  • Average 2021–2026

    55.4 °F

  • Average High 2021–2026

    67.9 °F
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