When to plant in Kenmore, WA
USDA Zone 9aKenmore, Washington frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
A generous ~260-day season lets Kenmore gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. In zone 9a, frost is a minor factor for Kenmore — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
SEATTLE SAND PT WSFO · 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 Kenmore’s own odds, recorded at SEATTLE SAND PT WSFO.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 26 | Apr 4 | Mar 17 | Oct 24 | Nov 5 | Nov 22 |
| 32°F | Mar 29 | Mar 8 | Feb 13 | Nov 4 | Nov 23 | Dec 16 |
| 28°F | Mar 1 | Feb 11 | Dec 27 | Nov 17 | Dec 11 | Jan 17 |
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 Kenmore, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 22 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.
Kenmore planting FAQ
When is the last spring frost in Kenmore, WA?
On average, the last spring frost in Kenmore is around March 8 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Kenmore, WA?
The first fall frost in Kenmore typically arrives around November 23 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Kenmore in?
Kenmore is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Kenmore?
Kenmore has about 260 frost-free days — a long growing season — between the average last spring frost (March 8) and first fall frost (November 23).
When should I plant tomatoes in Kenmore?
For Kenmore, sow tomatoes indoors about January 11–January 25 and move the seedlings out around March 15, after the last spring frost.
Never miss a window in Kenmore
An email when it’s time to start seeds, transplant, and sow — timed to Kenmore’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Lake Forest Park · 3 km
- Bothell · 4 km
- Bothell West · 6 km
- Mountlake Terrace · 6 km
- Kirkland · 7 km
- Alderwood Manor · 7 km
- Shoreline · 7 km
- Woodinville · 8 km
Frost dates recorded at SEATTLE SAND PT WSFO, 7 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 Kenmore, WA — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00094290. Retrieved from https://blissgarden.com/washington/kenmore.