Frost Dates for Auburn, WA
In Auburn, WA, the average last spring frost is around Mar 20 and the average first fall frost around Nov 10, for a growing season of about 233 days. For frost-tender plants, wait until Apr 8, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Kent, WA weather station, 8 miles away, elevation 30 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% | Apr 8 | Oct 26 |
| 20% | Apr 1 | Oct 31 |
| 30% | Mar 29 | Nov 3 |
| 40% | Mar 24 | Nov 7 |
| 50% | Mar 20 | Nov 10 |
| 60% | Mar 16 | Nov 13 |
| 70% | Mar 12 | Nov 17 |
| 80% | Mar 6 | Nov 22 |
| 90% | Feb 27 | Nov 26 |
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 11 | Oct 27 |
| Frost / freeze (32°F) | Mar 20 | Nov 10 |
| Hard freeze (28°F) | Feb 25 | Nov 24 |
Planting calendar for Auburn
Transplant Mar 27 – Apr 10
Transplant Apr 3 – Apr 17
Transplant Apr 3 – Apr 17
Transplant Mar 27 – Apr 10
Sow or transplant Mar 27 – Apr 10
Sow or transplant Mar 27 – Apr 10
Sow or transplant Apr 3 – Apr 17
Sow or transplant Feb 20 – Mar 6
Fall sowing Sep 15 – Oct 13
Fall sowing Sep 15 – Oct 6
Fall sowing Sep 1 – Sep 15
Sow or transplant Feb 20 – Mar 6
Fall sowing Sep 1 – Sep 29
Transplant Mar 6 – Mar 20
Fall sowing Aug 18 – Sep 1
Transplant Feb 27 – Mar 13
Fall sowing Aug 18 – Sep 1
Fall sowing Aug 18 – Sep 1
Fall sowing Sep 29 – Oct 20
Fall sowing Sep 1 – Sep 15
Plant Feb 20 – Mar 6
Based on the average last frost (Mar 20) and first frost (Nov 10). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.