Rainbow Spring Weather Forecast

    • 64
    • 83

    Chance Rain Showers

    • 61
    • 87

    Partly Sunny

    • 63
    • 92

    Mostly Sunny

    • 61
    • 94

    Partly Sunny

    • 57
    • 86

    Mostly Sunny

    • 59
    • 85

    Mostly Sunny

Today 27 Aug Lower Columbia Basin of Washington

Cloudy with a 20 percent chance of Showers. Highs in the mid 80s to lower 90s. South wind 5 to 15 Mph.

Tonight 27 Aug Lower Columbia Basin of Washington

Mostly cloudy. A 20 percent chance of Showers in the evening. Lows in the 60s. Southwest wind 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rainbow Spring Temperature Statistics

August Temperature

Tri-Cities Airport (39.8 miles)

  • Lowest 9 August, 2025

    52.6 °F

  • Average August

    76.4 °F

  • Highest 13 August, 2025

    102.7 °F

Climate (2020–Present)

Tri-Cities Airport (39.8 miles)

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  • Average Low 2020–2025

    42.8 °F

  • Average 2020–2025

    55.4 °F

  • Average High 2020–2025

    67.9 °F
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