When to plant in Cottage Lake, WA
USDA Zone 8bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Cottage Lake, Washington — all computed from Cottage Lake's nearest NOAA weather station.
In zone 8b, Cottage Lake supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
The average last spring frost in Cottage Lake is now 10 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
MONROE · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Cottage Lake’s own odds, recorded at MONROE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 20 | May 5 | Apr 20 | Sep 21 | Oct 6 | Oct 25 |
| 32°F | May 7 | Apr 17 | Mar 29 | Oct 7 | Oct 23 | Nov 9 |
| 28°F | Apr 14 | Mar 26 | Mar 6 | Oct 20 | Nov 8 | Nov 26 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Cottage Lake, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 24 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Cottage Lake planting FAQ
When is the last spring frost in Cottage Lake, WA?
Plan for the last spring frost in Cottage Lake around April 17 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Cottage Lake, WA?
The first fall frost in Cottage Lake typically arrives around October 23 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Cottage Lake in?
Cottage Lake is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Cottage Lake?
Cottage Lake has about 189 frost-free days — a moderate growing season — between the average last spring frost (April 17) and first fall frost (October 23).
When should I plant tomatoes in Cottage Lake?
For Cottage Lake, sow tomatoes indoors about February 20–March 6 and move the seedlings out around April 24, after the last spring frost.
Never miss a window in Cottage Lake
An email when it’s time to start seeds, transplant, and sow — timed to Cottage Lake’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Woodinville · 5 km
- Maltby · 7 km
- Redmond · 8 km
- Union Hill-Novelty Hill · 8 km
- Bothell · 10 km
- Bothell East · 10 km
- Kirkland · 11 km
- Kenmore · 13 km
Frost dates recorded at MONROE, 13 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Cottage Lake, WA — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00455525. Retrieved from https://blissgarden.com/washington/cottage-lake.