Mercer Ranch Airport Weather Forecast

    • 43
    • 66

    Rain Showers Likely

    • 40
    • 64

    Mostly Sunny

    • 44
    • 67

    Chance Rain Showers

    • 41
    • 67

    Mostly Sunny

    • 47
    • 69

    Partly Sunny

    • 47
    • 72

    Mostly Sunny

    • 46
    • 71

    Partly Sunny

Today 17 May Lower Columbia Basin of Washington

Mostly cloudy. A chance of rain Showers in the Morning, then rain Showers likely and a chance of Thunderstorms in the afternoon. Highs in the mid 60s to lower 70s. Southwest wind 5 to 15 Mph. Chance of precipitation 70 percent. Rainfall Amounts less than a quarter of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 17 May Lower Columbia Basin of Washington

Mostly cloudy. A chance of Showers and Thunderstorms in the Evening, then a chance of rain Showers overnight. Lows in the lower to mid 40s. West wind 5 to 15 Mph with Gusts to around 30 Mph. Chance of precipitation 50 percent. Rainfall Amounts less than a quarter of an Inch, except higher Amounts possible in Thunderstorms.

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Mercer Ranch Airport Temperature Statistics

May Temperature

Sunnyside Municipal Airport (29.2 miles)

  • Lowest 5 May, 2025

    33.3 °F

  • Average May

    57.7 °F

  • Highest 2 May, 2025

    84.4 °F

Climate (2020–Present)

Sunnyside Municipal Airport (29.2 miles)

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  • Average Low 2020–2025

    39.6 °F

  • Average 2020–2025

    52.3 °F

  • Average High 2020–2025

    64.6 °F
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