Frost dates · USDA zone 9a
Frost dates for Lynnwood, WA
Lynnwood, WA sees its last 32 °F night of spring around March 9 and its first of fall around November 17 — a 250-day freeze-free season in a typical year.
Pick a sauce; the Plan Builder runs this station's dates and hands back the calendar, plant count and gear list.
Freeze odds, by date
| Odds | Last spring freeze after | First fall freeze before |
|---|---|---|
| 9 years in 10 | Feb 15 | Dec 7 |
| Median — 1 year in 2 | Mar 9 | Nov 17 |
| 1 year in 10 | Mar 29 | Oct 31 |
The top row is the risky edge: in 9 years of 10 a spring freeze still comes after it, so tender transplants set out then need cover. The bottom row is the cautious date — only 1 year in 10 freezes after it — and the one to plan uncovered tender transplants against. Freeze-free season: 250 days median, at least 224 in 9 years of 10, at least 285 days in 1 year of 10. NOAA ranks season length year by year, so it is not the gap between two rows above. A hard freeze (28 °F) has a median last date of Feb 13 and first of Dec 6.
Lynnwood planting calendar, 2027
Every row runs from the median last frost (Mar 9) and median first frost (Nov 17) above, using each cultivar's days to maturity. Same engine as the Plan Builder.
| Crop | Start indoors | Transplant / plant | First harvest | Days |
|---|---|---|---|---|
| Hardneck GarlicSiberian (porcelain hardneck) | — | Oct 15prior fall | Jun 12 | 240 from sow |
| Spanish OnionYellow Sweet Spanish (long-day) | Dec 15 | Feb 9 | May 30 | 110 from transplant |
| Mustard greensGarnet Giant (Brassica juncea) | Direct sow | Mar 9 | Apr 8 | 30 from sow |
| CilantroSlow Bolt (Coriandrum sativum) | Feb 23 | Feb 23 | Apr 9 | 45 from sow |
| Genovese BasilGenovese | Feb 9 | Mar 23 | May 22 | 60 from transplant |
| CayenneLong Slim Cayenne (Capsicum annuum) | Jan 12 | Mar 16 | May 30 | 75 from transplant |
| HabaneroOrange Habanero (Capsicum chinense) | Dec 29 | Mar 23 | Jun 26 | 95 from transplant |
| JalapeñoEarly Jalapeño (Capsicum annuum) | Jan 12 | Mar 16 | May 30 | 75 from transplant |
| Marconi Red PepperMarconi Red (Capsicum annuum) | Jan 12 | Mar 16 | Jun 4 | 80 from transplant |
| SerranoSerrano Tampiqueño (Capsicum annuum) | Jan 12 | Mar 16 | Jun 4 | 80 from transplant |
| Nantes CarrotScarlet Nantes | Feb 23 | Feb 23 | May 4 | 70 from sow |
| TomatilloToma Verde | Jan 26 | Mar 16 | May 25 | 70 from transplant |
| Roma TomatoRoma VF (determinate paste) | Jan 26 | Mar 16 | May 30 | 75 from transplant |
| San Marzano TomatoSan Marzano (indeterminate paste) | Jan 26 | Mar 16 | Jun 4 | 80 from transplant |
Tight means first harvest lands within two weeks of the median first fall frost: start that crop indoors on time or cover it in fall.
What sauce can Lynnwood grow?
Each sauce, scheduled for a Lynnwood container garden: when the first seeds go in and when enough fruit has ripened for one batch.
Lynnwood frost questions
When is the last frost in Lynnwood, WA?
The median last 32 °F freeze at EVERETT SNOHOMISH AP, WA is March 9: half of years see a later one. One year in ten, a freeze still comes after March 29; nine years in ten, it comes after February 15. Source: NOAA NCEI 1991–2020 U.S. Climate Normals.
When is the first frost in Lynnwood, WA?
The median first 32 °F freeze of fall is November 17. One year in ten it arrives before October 31; nine years in ten, before December 7.
How long is the growing season in Lynnwood, WA?
250 days between the last spring and first fall 32 °F freeze in a median year. Nine years in ten the season runs at least 224 days; one year in ten, at least 285 days.
What growing zone is Lynnwood, WA?
USDA hardiness zone 9a, per the 2023 USDA Plant Hardiness Zone Map for ZIP 98037. A zone describes the coldest winter night, not when frost ends, so it is the wrong number for a planting calendar — the frost dates on this page are the right one.
When should I plant tomatoes in Lynnwood, WA?
Start Roma VF (determinate paste) seeds indoors around Jan 26 and transplant around Mar 16, 1 week after the median last frost. To cut the freeze risk to one year in ten, wait for Mar 29. First ripe fruit lands around May 30.
When should I plant peppers in Lynnwood, WA?
Sow jalapeño indoors on a heat mat around Jan 12; transplant no earlier than Mar 16, and wait past it until nights hold above 50 °F — that can run weeks later. First green pods around May 30.
Nearby in Washington
- Edmondslast frost Mar 9
- Shorelinelast frost Mar 8
- Bothelllast frost Mar 8
- Kirklandlast frost Mar 8
- Everettlast frost Mar 24
- Redmondlast frost Mar 8
All Washington frost dates → · How frost-date math drives a sowing calendar →