Oso, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oso, a community in Snohomish County, Washington.
This Afternoon
62°F
Mostly Cloudy
Mostly cloudy. High near 62, with temperatures falling to around 52 in the afternoon. Northwest wind around 1 mph.
7-day forecast for Oso
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 62°F | Mostly Cloudy | 1 mph NW | 4% |
| Tonight | 39°F | Partly Cloudy | 5 mph N | 5% |
| Wednesday | 64°F | Mostly Sunny | 3 mph NNE | 11% |
| Wednesday Night | 44°F | Light Rain | 2 to 9 mph SE | 100% |
| Thursday | 57°F | Light Rain Likely | 5 mph SSE | 68% |
| Thursday Night | 43°F | Light Rain | 5 to 9 mph SE | 92% |
| Friday | 57°F | Light Rain | 5 to 10 mph SE | 92% |
| Friday Night | 43°F | Chance Light Rain | 7 mph ESE | 51% |
| Saturday | 64°F | Chance Light Rain | 7 mph ESE | 36% |
| Saturday Night | 45°F | Rain | 6 to 14 mph SSE | 87% |
| Sunday | 57°F | Light Rain | 2 to 12 mph SSW | 87% |
| Sunday Night | 41°F | Chance Light Rain | 2 to 8 mph ESE | 43% |
| Monday | 59°F | Chance Light Rain | 7 mph ESE | 52% |
| Monday Night | 43°F | Light Rain | 5 to 12 mph ESE | 75% |
Forecast source: National Weather Service (api.weather.gov) for Oso (48.284, -121.916). Updated through the day.
Growing snapshot for Oso
Last spring frost
Apr 22
First fall frost
Oct 19
Growing season
181 days
Hardiness zone
8b
More local growing data for Oso: nearby ZIP 98223 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Alderwood Manor
Arlington
Arlington Heights
Bothell East
Bothell West
Brier
Bunk Foss
Canyon Creek
Cathcart
Cavalero
Chain Lake
Clearview
Darrington
Eastmont
Edmonds
Esperance
Everett
Fobes Hill
Gold Bar
Granite Falls
Hat Island
Kayak Point
Lake Bosworth
Lake Cassidy
Lake Cavanaugh
Lake Goodwin
Lake Roesiger
Lake Stevens
Lake Stickney
Larch Way
Climate data from the nearest NOAA station, Arlington, Wa (8.1 mi from Oso). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.