Gaston Weather Forecast

    • 51
    • 80

    Mostly Sunny

    • 52
    • 76

    Mostly Sunny

    • 50
    • 81

    Sunny

    • 55
    • 78

    Chance Rain

    • 52
    • 75

    Partly Sunny

    • 55
    • 78

    Mostly Sunny

Today 17 Sep Tualatin Valley

Sunny. Highs in the lower 80s. Northwest wind 5 to 10 Mph.

Tonight 17 Sep Tualatin Valley

Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 50s. Northwest wind 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Gaston Temperature Statistics

September Temperature

Portland-Hillsboro Airport (11.8 miles)

  • Lowest 15 September, 2025

    44.1 °F

  • Average September

    67 °F

  • Highest 2 September, 2025

    91 °F

Climate (2020–Present)

Portland-Hillsboro Airport (11.8 miles)

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

  • Average Low 2020–2025

    43.2 °F

  • Average 2020–2025

    53.6 °F

  • Average High 2020–2025

    64.3 °F
Get WillyWeather+ to remove ads