Gaston Weather Forecast
- 41
- 61
Chance Rain Showers
- 48
- 67
Partly Sunny
- 44
- 66
Mostly Cloudy
- 44
- 67
Mostly Cloudy
- 47
- 71
Mostly Sunny
- 50
- 79
Chance Rain Showers
Today 20 May Tualatin Valley
Partly sunny with a 50 percent chance of rain Showers. Highs in the lower 60s. Winds light. Rainfall Amounts less than a tenth of an inch.
Tonight 20 May Tualatin Valley
Partly cloudy. Lows in the lower 40s. Winds light in the Evening, becoming light and variable.
Gaston Temperature Statistics
May Temperature
Portland-Hillsboro Airport (11.8 miles)
Lowest 4 May, 2025
35.6 °FAverage May
54.3 °FHighest 6 May, 2025
80.6 °F
Climate (2020–Present)
Portland-Hillsboro Airport (11.8 miles)
Average Low 2020–2025
43.2 °FAverage 2020–2025
53.4 °FAverage High 2020–2025
64.1 °F