Cottage Lake, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cottage Lake, a community in King County, Washington.
This Afternoon
73°F
Mostly Sunny
Mostly sunny. High near 73, with temperatures falling to around 71 in the afternoon. North northwest wind around 1 mph.
7-day forecast for Cottage Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Mostly Sunny | 1 mph NNW | 0% |
| Tonight | 50°F | Mostly Clear | 1 mph N | 0% |
| Sunday | 73°F | Mostly Sunny | 2 mph N | 0% |
| Sunday Night | 50°F | Partly Cloudy | 2 mph N | 0% |
| Monday | 71°F | Partly Sunny | 2 mph N | 0% |
| Monday Night | 51°F | Partly Cloudy | 2 mph N | 2% |
| Tuesday | 68°F | Mostly Cloudy | 1 mph NNW | 2% |
| Tuesday Night | 50°F | Mostly Cloudy | 2 mph NE | 13% |
| Wednesday | 67°F | Partly Sunny then Slight Chance Light Rain | 2 mph SSW | 17% |
| Wednesday Night | 49°F | Slight Chance Light Rain then Mostly Cloudy | 2 mph N | 17% |
| Thursday | 63°F | Mostly Cloudy then Slight Chance Light Rain | 2 mph N | 20% |
| Thursday Night | 49°F | Slight Chance Light Rain | 2 mph N | 20% |
| Friday | 63°F | Slight Chance Light Rain | 2 mph N | 21% |
| Friday Night | 47°F | Slight Chance Light Rain then Mostly Cloudy | 2 mph NE | 19% |
Forecast source: National Weather Service (api.weather.gov) for Cottage Lake (47.746, -122.076). Updated through the day.
Growing snapshot for Cottage Lake
Last spring frost
Apr 17
First fall frost
Oct 23
Growing season
188 days
Hardiness zone
8b
More local growing data for Cottage Lake: nearby ZIP 98077 weather · frost dates · planting calendar · Washington frost dates
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Climate data from the nearest NOAA station, Monroe, Wa (7.1 mi from Cottage Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.