Gaston, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Gaston, a city in Washington County, Oregon.
Tonight
38°F
Mostly Clear then Areas Of Fog
Areas of fog after midnight. Mostly clear, with a low around 38. Wind around 0 mph.
7-day forecast for Gaston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 38°F | Mostly Clear then Areas Of Fog | 0 mph | 4% |
| Wednesday | 56°F | Areas Of Fog then Light Rain Likely | 2 mph S | 71% |
| Wednesday Night | 44°F | Light Rain then Areas Of Fog | 2 mph SSW | 96% |
| Thursday | 59°F | Areas Of Fog then Partly Sunny | 0 to 3 mph S | 6% |
| Thursday Night | 43°F | Areas Of Fog | 0 mph | 60% |
| Friday | 58°F | Light Rain Likely | 0 to 3 mph S | 60% |
| Friday Night | 45°F | Slight Chance Light Rain then Areas Of Fog | 0 mph | 19% |
| Saturday | 62°F | Areas Of Fog then Slight Chance Light Rain | 2 mph S | 24% |
| Saturday Night | 47°F | Light Rain Likely | 1 to 9 mph S | 67% |
| Sunday | 59°F | Light Rain Likely | 0 to 6 mph SSW | 60% |
| Sunday Night | 43°F | Areas Of Fog | 0 mph | 18% |
| Monday | 58°F | Areas Of Fog then Chance Light Rain | 2 mph SSE | 46% |
| Monday Night | 44°F | Chance Light Rain then Areas Of Fog | 2 mph SSE | 57% |
| Tuesday | 59°F | Light Rain Likely | 2 mph S | 58% |
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 Nov 4, 2026.