Lake Cassidy, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lake Cassidy, a community in Snohomish County, Washington.
Today
57°F
Mostly Cloudy
Mostly cloudy. High near 57, with temperatures falling to around 51 in the afternoon. Northwest wind around 1 mph.
7-day forecast for Lake Cassidy
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 57°F | Mostly Cloudy | 1 mph NW | 4% |
| Tonight | 37°F | Patchy Fog | 2 mph E | 4% |
| Wednesday | 59°F | Mostly Sunny then Slight Chance Light Rain | 3 mph SE | 16% |
| Wednesday Night | 46°F | Light Rain | 3 to 9 mph SSE | 96% |
| Thursday | 55°F | Chance Light Rain | 5 mph SSE | 53% |
| Thursday Night | 45°F | Light Rain | 3 to 9 mph SE | 84% |
| Friday | 55°F | Light Rain | 5 to 9 mph SE | 84% |
| Friday Night | 45°F | Chance Light Rain | 6 mph SE | 48% |
| Saturday | 62°F | Chance Light Rain | 5 mph SE | 33% |
| Saturday Night | 48°F | Light Rain | 3 to 14 mph SSE | 80% |
| Sunday | 55°F | Light Rain | 2 to 13 mph S | 80% |
| Sunday Night | 41°F | Chance Light Rain | 2 to 6 mph SE | 37% |
| Monday | 56°F | Chance Light Rain | 5 mph SE | 52% |
| Monday Night | 45°F | Light Rain Likely | 3 to 12 mph SE | 71% |
Forecast source: National Weather Service (api.weather.gov) for Lake Cassidy (48.066, -122.082). Updated through the day.
Growing snapshot for Lake Cassidy
Last spring frost
Mar 24
First fall frost
Nov 2
Growing season
223 days
Hardiness zone
8b
More local growing data for Lake Cassidy: nearby ZIP 98258 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Alderwood Manor
Arlington
Arlington Heights
Bothell East
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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 Bosworth
Lake Cavanaugh
Lake Goodwin
Lake Roesiger
Lake Stevens
Lake Stickney
Larch Way
Lochsloy
Climate data from the nearest NOAA station, Everett, Wa (6.6 mi from Lake Cassidy). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.