Mercer Ranch Airport Weather Forecast

    • 50
    • 75

    Increasing Clouds

    • 55
    • 76

    Rain Showers Likely

    • 45
    • 68

    Rain Showers Likely

    • 45
    • 64

    Partly Sunny

    • 45
    • 66

    Partly Sunny

    • 47
    • 68

    Partly Sunny

Today 23 Sep Lower Columbia Basin of Washington

Partly cloudy. Highs in the mid to upper 70s. South wind 5 to 10 Mph.

Tonight 23 Sep Lower Columbia Basin of Washington

Partly cloudy. Lows in the upper 40s to lower 50s. Light wind.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Mercer Ranch Airport Temperature Statistics

September Temperature

Sunnyside Municipal Airport (29.2 miles)

  • Lowest 14 September, 2026

    42.4 °F

  • Average September

    61.1 °F

  • Highest 1 September, 2026

    85.5 °F

Climate (2021–2026)

Sunnyside Municipal Airport (29.2 miles)

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

  • Average Low 2021–2026

    38.8 °F

  • Average 2021–2026

    51 °F

  • Average High 2021–2026

    63 °F
Get WillyWeather+ to remove ads