Frost Dates for Medford, OR
In Medford, OR, the average last spring frost is around Apr 8 and the average first fall frost around Oct 29, for a growing season of about 204 days. For frost-tender plants, wait until Apr 30, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Medford Rogue Vly Airport, OR weather station, 3 miles away, elevation 1,297 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 30 | Oct 14 |
| 20% | Apr 23 | Oct 19 |
| 30% | Apr 18 | Oct 23 |
| 40% | Apr 12 | Oct 26 |
| 50% | Apr 8 | Oct 29 |
| 60% | Apr 3 | Oct 31 |
| 70% | Mar 30 | Nov 4 |
| 80% | Mar 25 | Nov 8 |
| 90% | Mar 17 | Nov 16 |
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 30 | Oct 16 |
| Frost / freeze (32°F) | Apr 8 | Oct 29 |
| Hard freeze (28°F) | Mar 10 | Nov 13 |
Planting calendar for Medford
Transplant Apr 15 – Apr 29
Transplant Apr 22 – May 6
Transplant Apr 22 – May 6
Transplant Apr 15 – Apr 29
Sow or transplant Apr 15 – Apr 29
Sow or transplant Apr 15 – Apr 29
Sow or transplant Apr 22 – May 6
Sow or transplant Mar 11 – Mar 25
Fall sowing Sep 3 – Oct 1
Fall sowing Sep 3 – Sep 24
Fall sowing Aug 20 – Sep 3
Sow or transplant Mar 11 – Mar 25
Fall sowing Aug 20 – Sep 17
Transplant Mar 25 – Apr 8
Fall sowing Aug 6 – Aug 20
Transplant Mar 18 – Apr 1
Fall sowing Aug 6 – Aug 20
Fall sowing Aug 6 – Aug 20
Fall sowing Sep 17 – Oct 8
Fall sowing Aug 20 – Sep 3
Plant Mar 11 – Mar 25
Based on the average last frost (Apr 8) and first frost (Oct 29). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.