Lake Marcel-Stillwater, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lake Marcel-Stillwater, a community in King County, Washington.
Today
72°F
Mostly Sunny
Mostly sunny. High near 72, with temperatures falling to around 70 in the afternoon. Wind around 0 mph.
7-day forecast for Lake Marcel-Stillwater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 50°F | Mostly Clear | 0 mph | 0% |
| Sunday | 73°F | Mostly Sunny | 1 mph NNW | 0% |
| Sunday Night | 49°F | Mostly Clear | 1 mph NNW | 0% |
| Monday | 70°F | Mostly Sunny | 1 mph NW | 0% |
| Monday Night | 48°F | Partly Cloudy | 1 mph NNW | 1% |
| Tuesday | 67°F | Partly Sunny | 0 mph | 1% |
| Tuesday Night | 47°F | Mostly Cloudy | 0 mph | 11% |
| Wednesday | 66°F | Partly Sunny then Slight Chance Light Rain | 0 mph | 16% |
| Wednesday Night | 47°F | Slight Chance Light Rain then Mostly Cloudy | 0 mph | 16% |
| Thursday | 64°F | Mostly Cloudy then Slight Chance Light Rain | 1 mph NNW | 20% |
| Thursday Night | 46°F | Slight Chance Light Rain | 1 mph NNW | 20% |
| Friday | 62°F | Slight Chance Light Rain | 0 mph | 19% |
| Friday Night | 45°F | Slight Chance Light Rain | 0 mph | 17% |
Forecast source: National Weather Service (api.weather.gov) for Lake Marcel-Stillwater (47.695, -121.915). Updated through the day.
Growing snapshot for Lake Marcel-Stillwater
Last spring frost
Apr 17
First fall frost
Oct 23
Growing season
188 days
Hardiness zone
8b
More local growing data for Lake Marcel-Stillwater: nearby ZIP 98019 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
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Black Diamond
Bothell
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Clyde Hill
Cottage Lake
Covington
Des Moines
Duvall
East Renton Highlands
Fairwood
Fall City
Federal Way
Greenwater
High Bridge
Hobart
Hunts Point
Index
Issaquah
Kenmore
Kent
Kirkland
Climate data from the nearest NOAA station, Monroe, Wa (8 mi from Lake Marcel-Stillwater). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.