Lake Bosworth, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lake Bosworth, a community in Snohomish County, Washington.
Today
85°F
Smoke
Smoke after 8am. Sunny, with a high near 85. West wind 1 to 6 mph.
7-day forecast for Lake Bosworth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Smoke | 1 to 6 mph W | 0% |
| Tonight | 56°F | Patchy Smoke | 1 to 5 mph WNW | 0% |
| Wednesday | 89°F | Areas Of Smoke | 0 to 3 mph W | 0% |
| Wednesday Night | 59°F | Clear | 3 mph N | 0% |
| Thursday | 89°F | Sunny | 0 to 3 mph WNW | 0% |
| Thursday Night | 59°F | Mostly Clear | 3 mph NE | 0% |
| Friday | 85°F | Sunny | 3 mph SW | 0% |
| Friday Night | 57°F | Mostly Clear | 3 mph N | 0% |
| Saturday | 80°F | Sunny | 0 to 7 mph NW | 0% |
| Saturday Night | 54°F | Mostly Clear | 1 to 7 mph N | 0% |
| Sunday | 77°F | Mostly Sunny | 0 to 5 mph NNW | 0% |
| Sunday Night | 53°F | Mostly Clear | 1 to 5 mph N | 2% |
| Monday | 77°F | Mostly Sunny | 0 to 3 mph NW | 2% |
| Monday Night | 53°F | Partly Cloudy | 3 mph N | 1% |
Forecast source: National Weather Service (api.weather.gov) for Lake Bosworth (48.055, -121.982). Updated through the day.
Growing snapshot for Lake Bosworth
Last spring frost
Apr 17
First fall frost
Oct 23
Growing season
188 days
Hardiness zone
8b
More local growing data for Lake Bosworth: nearby ZIP 98290 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Alderwood Manor
Arlington
Arlington Heights
Bothell East
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Bunk Foss
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Cathcart
Cavalero
Chain Lake
Clearview
Darrington
Eastmont
Edmonds
Esperance
Everett
Fobes Hill
Gold Bar
Granite Falls
Hat Island
Kayak Point
Lake Cassidy
Lake Cavanaugh
Lake Goodwin
Lake Roesiger
Lake Stevens
Lake Stickney
Larch Way
Lochsloy
Climate data from the nearest NOAA station, Monroe, Wa (7.6 mi from Lake Bosworth). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.