Gaston, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Gaston, a city in Washington County, Oregon.
This Afternoon
73°F
Sunny
Sunny, with a high near 73. South southeast wind around 1 mph.
7-day forecast for Gaston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Sunny | 1 mph SSE | 0% |
| Tonight | 51°F | Mostly Clear then Patchy Fog | 2 mph N | 0% |
| Saturday | 79°F | Patchy Fog then Partly Sunny | 2 mph NNE | 0% |
| Saturday Night | 52°F | Partly Cloudy | 2 mph N | 0% |
| Sunday | 83°F | Sunny | 1 to 5 mph NNW | 0% |
| Sunday Night | 52°F | Mostly Clear | 0 to 5 mph NNW | 0% |
| Monday | 77°F | Mostly Sunny | 0 to 6 mph N | 0% |
| Monday Night | 51°F | Partly Cloudy | 0 to 6 mph NNW | 0% |
| Tuesday | 74°F | Patchy Fog then Mostly Sunny | 0 to 5 mph N | 0% |
| Tuesday Night | 49°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
| Wednesday | 72°F | Mostly Sunny | 2 mph NNE | 0% |
| Wednesday Night | 51°F | Partly Cloudy | 2 mph N | 2% |
| Thursday | 75°F | Mostly Sunny | 2 mph N | 6% |
| Thursday Night | 52°F | Slight Chance Light Rain | 2 mph NNW | 21% |
Forecast source: National Weather Service (api.weather.gov) for Gaston (45.435, -123.145). Updated through the day.
Growing snapshot for Gaston
Last spring frost
Apr 16
First fall frost
Oct 26
Growing season
192 days
Hardiness zone
8b
More local growing data for Gaston: nearby ZIP 97119 weather · frost dates · planting calendar · Oregon frost dates
Nearby towns & communities
Aloha
Banks
Beaverton
Bethany
Bull Mountain
Cedar Hills
Cedar Mill
Cherry Grove
Cornelius
Dilley
Durham
Forest Grove
Garden Home-Whitford
Hillsboro
King City
Marlene Village
Metzger
North Plains
Oak Hills
Raleigh Hills
Rockcreek
Sherwood
Tigard
Tualatin
West Haven-Sylvan
West Slope
Climate data from the nearest NOAA station, Forest Grove, Or (6.8 mi from Gaston). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.