Frost Dates for Springfield, OR
In Springfield, OR, the average last spring frost is around Apr 11 and the average first fall frost around Oct 23, for a growing season of about 196 days. For frost-tender plants, wait until May 9, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Eugene Mahlon Sweet Airport, OR weather station, 13 miles away, elevation 353 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% | May 9 | Oct 6 |
| 20% | Apr 30 | Oct 11 |
| 30% | Apr 25 | Oct 15 |
| 40% | Apr 17 | Oct 19 |
| 50% | Apr 11 | Oct 23 |
| 60% | Apr 3 | Oct 27 |
| 70% | Mar 29 | Oct 31 |
| 80% | Mar 23 | Nov 5 |
| 90% | Mar 15 | Nov 13 |
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) | May 15 | Oct 7 |
| Frost / freeze (32°F) | Apr 11 | Oct 23 |
| Hard freeze (28°F) | Mar 3 | Nov 11 |
Planting calendar for Springfield
Transplant Apr 18 – May 2
Transplant Apr 25 – May 9
Transplant Apr 25 – May 9
Transplant Apr 18 – May 2
Sow or transplant Apr 18 – May 2
Sow or transplant Apr 18 – May 2
Sow or transplant Apr 25 – May 9
Sow or transplant Mar 14 – Mar 28
Fall sowing Aug 28 – Sep 25
Fall sowing Aug 28 – Sep 18
Fall sowing Aug 14 – Aug 28
Sow or transplant Mar 14 – Mar 28
Fall sowing Aug 14 – Sep 11
Transplant Mar 28 – Apr 11
Fall sowing Jul 31 – Aug 14
Transplant Mar 21 – Apr 4
Fall sowing Jul 31 – Aug 14
Fall sowing Jul 31 – Aug 14
Fall sowing Sep 11 – Oct 2
Fall sowing Aug 14 – Aug 28
Plant Mar 14 – Mar 28
Based on the average last frost (Apr 11) and first frost (Oct 23). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.