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
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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 18, 2026.