When to plant in Auburn, WA
USDA Zone 8bEverything below — frost dates, hardiness zone, and what to plant when in Auburn, Washington — is derived from the closest NOAA station with complete climate normals.
In zone 8b, Auburn 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 Auburn is now 9 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
KENT · 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 Auburn’s own odds, recorded at KENT.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 30 | Apr 11 | Mar 26 | Oct 13 | Oct 27 | Nov 11 |
| 32°F | Apr 8 | Mar 20 | Feb 27 | Oct 26 | Nov 10 | Nov 26 |
| 28°F | Mar 16 | Feb 25 | Jan 19 | Nov 6 | Nov 24 | Dec 20 |
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 Auburn, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 17 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.
Auburn planting FAQ
When is the last spring frost in Auburn, WA?
Plan for the last spring frost in Auburn around March 20 (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 Auburn, WA?
In Auburn, the first 32°F freeze of fall lands around November 10 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Auburn in?
Auburn is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Auburn?
Auburn has about 235 frost-free days — a long growing season — between the average last spring frost (March 20) and first fall frost (November 10).
When should I plant tomatoes in Auburn?
For Auburn, sow tomatoes indoors about January 23–February 6 and move the seedlings out around March 27, after the last spring frost.
Never miss a window in Auburn
An email when it’s time to start seeds, transplant, and sow — timed to Auburn’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Lakeland South · 6 km
- Lakeland North · 7 km
- Lake Morton-Berrydale · 9 km
- Lake Tapps · 9 km
- Sumner · 9 km
- Kent · 9 km
- Federal Way · 10 km
- Edgewood · 10 km
Frost dates recorded at KENT, 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 Auburn, WA — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00454169. Retrieved from https://blissgarden.com/washington/auburn.