Frost Dates for Lynnwood, WA
In Lynnwood, WA, the average last spring frost is around Mar 9 and the average first fall frost around Nov 17, for a growing season of about 250 days. For frost-tender plants, wait until Mar 29, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Everett Snohomish Airport, WA weather station, 6 miles away, elevation 606 ft. Frost can come earlier in low spots and valleys and later near cities and large lakes.
Frost probability by date
Chance of a 32°F frost after the spring date, or before the fall date.
| Chance | Last spring frost | First fall frost |
|---|---|---|
| 10% | Mar 29 | Oct 31 |
| 20% | Mar 22 | Nov 6 |
| 30% | Mar 17 | Nov 10 |
| 40% | Mar 14 | Nov 13 |
| 50% | Mar 9 | Nov 17 |
| 60% | Mar 5 | Nov 21 |
| 70% | Mar 2 | Nov 25 |
| 80% | Feb 26 | Dec 1 |
| 90% | Feb 15 | Dec 7 |
Light frost vs. hard freeze
Average (50%) dates for each temperature. Tender plants are damaged at 36°F; most hardy crops survive until 28°F.
| Temperature | Last in spring | First in fall |
|---|---|---|
| Light frost (36°F) | Apr 3 | Nov 2 |
| Frost / freeze (32°F) | Mar 9 | Nov 17 |
| Hard freeze (28°F) | Feb 13 | Dec 6 |
Planting calendar for Lynnwood
Transplant Mar 16 – Mar 30
Transplant Mar 23 – Apr 6
Transplant Mar 23 – Apr 6
Transplant Mar 16 – Mar 30
Sow or transplant Mar 16 – Mar 30
Sow or transplant Mar 16 – Mar 30
Sow or transplant Mar 23 – Apr 6
Sow or transplant Feb 9 – Feb 23
Fall sowing Sep 22 – Oct 20
Fall sowing Sep 22 – Oct 13
Fall sowing Sep 8 – Sep 22
Sow or transplant Feb 9 – Feb 23
Fall sowing Sep 8 – Oct 6
Transplant Feb 23 – Mar 9
Fall sowing Aug 25 – Sep 8
Transplant Feb 16 – Mar 2
Fall sowing Aug 25 – Sep 8
Fall sowing Aug 25 – Sep 8
Fall sowing Oct 6 – Oct 27
Fall sowing Sep 8 – Sep 22
Plant Feb 9 – Feb 23
Based on the average last frost (Mar 9) and first frost (Nov 17). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.