West Haven-Sylvan, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for West Haven-Sylvan, a community in Washington County, Oregon.
Overnight
53°F
Partly Cloudy
Partly cloudy, with a low around 53. North wind around 1 mph.
7-day forecast for West Haven-Sylvan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Partly Cloudy | 1 mph N | 0% |
| Saturday | 76°F | Patchy Fog then Mostly Sunny | 2 mph N | 0% |
| Saturday Night | 54°F | Mostly Clear | 2 mph N | 0% |
| Sunday | 80°F | Sunny | 5 mph N | 0% |
| Sunday Night | 55°F | Mostly Clear | 5 mph NNW | 0% |
| Monday | 74°F | Mostly Sunny | 5 mph NNW | 0% |
| Monday Night | 54°F | Partly Cloudy | 1 to 5 mph NNW | 0% |
| Tuesday | 71°F | Mostly Sunny | 3 mph NNW | 0% |
| Tuesday Night | 51°F | Partly Cloudy | 1 to 5 mph NNW | 0% |
| Wednesday | 69°F | Partly Sunny | 2 mph NNW | 0% |
| Wednesday Night | 53°F | Mostly Cloudy | 2 mph NNW | 2% |
| Thursday | 68°F | Partly Sunny | 1 to 5 mph NNW | 11% |
| Thursday Night | 51°F | Mostly Cloudy | 5 mph NNW | 11% |
| Friday | 66°F | Mostly Sunny | 6 mph NNW | 9% |
Forecast source: National Weather Service (api.weather.gov) for West Haven-Sylvan (45.516, -122.765). Updated through the day.
Growing snapshot for West Haven-Sylvan
Last spring frost
Feb 11
First fall frost
Dec 5
Growing season
303 days
Hardiness zone
8b
More local growing data for West Haven-Sylvan: nearby ZIP 97225 weather · frost dates · planting calendar · Oregon frost dates
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Climate data from the nearest NOAA station, Nature Park-Beaverton, Or (3.4 mi from West Haven-Sylvan). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.