Bethany, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bethany, a community in Washington County, Oregon.
This Afternoon
60°F
Partly Sunny
Partly sunny. High near 60, with temperatures falling to around 56 in the afternoon. Wind around 0 mph.
7-day forecast for Bethany
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 60°F | Partly Sunny | 0 mph | 5% |
| Tonight | 40°F | Mostly Clear then Areas Of Fog | 0 mph | 5% |
| Wednesday | 56°F | Areas Of Fog then Light Rain Likely | 2 mph SSE | 61% |
| Wednesday Night | 47°F | Light Rain | 3 mph SSW | 93% |
| Thursday | 58°F | Patchy Fog then Partly Sunny | 2 mph SSW | 12% |
| Thursday Night | 46°F | Light Rain Likely | 1 mph SSE | 60% |
| Friday | 57°F | Light Rain Likely | 3 mph SSE | 60% |
| Friday Night | 47°F | Slight Chance Light Rain then Mostly Cloudy | 1 mph ENE | 19% |
| Saturday | 62°F | Patchy Fog then Slight Chance Light Rain | 2 mph SE | 16% |
| Saturday Night | 50°F | Light Rain Likely | 2 to 10 mph S | 65% |
| Sunday | 59°F | Light Rain Likely | 1 to 8 mph SSW | 65% |
| Sunday Night | 46°F | Areas Of Fog | 1 mph NNW | 20% |
| Monday | 57°F | Areas Of Fog | 2 mph ESE | 47% |
| Monday Night | 48°F | Chance Light Rain | 2 mph SE | 53% |
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
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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 Nov 4, 2026.