Bethany, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bethany, a community in Washington County, Oregon.
Overnight
59°F
Areas Of Smoke
Areas of smoke. Clear. Low around 59, with temperatures rising to around 61 overnight. North northeast wind around 8 mph.
7-day forecast for Bethany
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 59°F | Areas Of Smoke | 8 mph NNE | 0% |
| Tuesday | 96°F | Areas Of Smoke | 8 mph NNE | 0% |
| Tuesday Night | 64°F | Smoke | 5 to 8 mph N | 0% |
| Wednesday | 99°F | Areas Of Smoke | 5 mph N | 0% |
| Wednesday Night | 64°F | Clear | 1 to 5 mph NNW | 0% |
| Thursday | 98°F | Sunny | 0 to 3 mph N | 0% |
| Thursday Night | 62°F | Clear | 0 to 5 mph NNW | 0% |
| Friday | 93°F | Sunny | 0 to 8 mph N | 0% |
| Friday Night | 60°F | Mostly Clear | 2 to 8 mph NNW | 0% |
| Saturday | 86°F | Sunny | 2 to 10 mph NNW | 0% |
| Saturday Night | 56°F | Mostly Clear | 2 to 10 mph NNW | 0% |
| Sunday | 81°F | Sunny | 2 to 9 mph NNW | 0% |
| Sunday Night | 54°F | Mostly Clear | 1 to 9 mph NNW | 0% |
| Monday | 81°F | Sunny | 1 to 8 mph NNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Bethany (45.561, -122.837). Updated through the day.
Growing snapshot for Bethany
Last spring frost
Feb 11
First fall frost
Dec 5
Growing season
303 days
Hardiness zone
8b
More local growing data for Bethany: nearby ZIP 97229 weather · frost dates · planting calendar · Oregon frost dates
Nearby towns & communities
Aloha
Banks
Beaverton
Bull Mountain
Cedar Hills
Cedar Mill
Cherry Grove
Cornelius
Dilley
Durham
Forest Grove
Garden Home-Whitford
Gaston
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, Nature Park-Beaverton, Or (3.8 mi from Bethany). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.