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
73°F
Mostly Sunny
Mostly sunny. High near 73, with temperatures falling to around 71 in the afternoon. West northwest wind around 2 mph.
7-day forecast for Lake Cassidy
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Mostly Sunny | 2 mph WNW | 0% |
| Tonight | 48°F | Mostly Clear | 2 mph NNW | 0% |
| Sunday | 72°F | Partly Sunny | 3 mph NNW | 0% |
| Sunday Night | 48°F | Partly Cloudy | 3 mph N | 0% |
| Monday | 71°F | Mostly Sunny | 3 mph NNW | 0% |
| Monday Night | 49°F | Partly Cloudy | 3 mph N | 1% |
| Tuesday | 68°F | Partly Sunny | 2 mph N | 1% |
| Tuesday Night | 47°F | Mostly Cloudy | 2 mph NNE | 11% |
| Wednesday | 67°F | Partly Sunny then Slight Chance Light Rain | 2 mph S | 17% |
| Wednesday Night | 48°F | Slight Chance Light Rain then Mostly Cloudy | 2 mph NNW | 17% |
| Thursday | 65°F | Mostly Cloudy then Slight Chance Light Rain | 3 mph NW | 17% |
| Thursday Night | 46°F | Slight Chance Light Rain | 3 mph NNW | 21% |
| Friday | 64°F | Slight Chance Light Rain | 2 mph NNW | 21% |
| Friday Night | 45°F | Partly Cloudy | 2 mph NNE | 14% |
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
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 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 Sep 19, 2026.