Lake Cassidy, WA Weather & Growing Conditions
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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Mostly Sunny | 2 mph WNW | 0% |
| Tonight | 48°F | Mostly Clear | 2 mph NNW | 0% |
| Sunday | 73°F | Partly Sunny | 3 mph NNW | 0% |
| Sunday Night | 48°F | Partly Cloudy | 0 to 3 mph NNW | 0% |
| Monday | 72°F | Mostly Sunny | 0 to 3 mph NW | 0% |
| Monday Night | 48°F | Partly Cloudy | 0 to 3 mph N | 1% |
| Tuesday | 68°F | Partly Sunny | 2 mph NNW | 1% |
| Tuesday Night | 47°F | Mostly Cloudy | 2 mph NNE | 12% |
| Wednesday | 68°F | Partly Sunny then Slight Chance Light Rain | 2 mph N | 17% |
| Wednesday Night | 47°F | Slight Chance Light Rain then Mostly Cloudy | 2 mph N | 17% |
| Thursday | 66°F | Mostly Cloudy then Slight Chance Light Rain | 3 mph N | 17% |
| Thursday Night | 47°F | Slight Chance Light Rain | 0 to 3 mph NNW | 20% |
| Friday | 65°F | Slight Chance Light Rain | 2 mph NNW | 20% |
| Friday Night | 45°F | Partly Cloudy | 2 mph NNE | 14% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lake Cassidy, WA
Last spring frost
Mar 24
First fall frost
Nov 2
Growing season
223 days
Hardiness zone
8b
Explore more for Lake Cassidy, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Everett, Wa (6.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.