Frost Dates for Bend, OR
In Bend, OR, the average last spring frost is around Jun 6 and the average first fall frost around Sep 20, for a growing season of about 105 days. For frost-tender plants, wait until Jun 22, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Bend, OR weather station, 1 mile away, elevation 3,660 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% | Jun 22 | Sep 3 |
| 20% | Jun 18 | Sep 8 |
| 30% | Jun 14 | Sep 12 |
| 40% | Jun 10 | Sep 16 |
| 50% | Jun 6 | Sep 20 |
| 60% | Jun 3 | Sep 23 |
| 70% | May 30 | Sep 26 |
| 80% | May 24 | Sep 30 |
| 90% | May 17 | Oct 5 |
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) | — | — |
| Frost / freeze (32°F) | Jun 6 | Sep 20 |
| Hard freeze (28°F) | May 11 | Oct 4 |
Planting calendar for Bend
Transplant Jun 13 – Jun 27
Transplant Jun 20 – Jul 4
Transplant Jun 20 – Jul 4
Transplant Jun 13 – Jun 27
Sow or transplant Jun 13 – Jun 27
Sow or transplant Jun 13 – Jun 27
Sow or transplant Jun 20 – Jul 4
Sow or transplant May 9 – May 23
Fall sowing Jul 26 – Aug 23
Fall sowing Jul 26 – Aug 16
Fall sowing Jul 12 – Jul 26
Sow or transplant May 9 – May 23
Fall sowing Jul 12 – Aug 9
Transplant May 23 – Jun 6
Fall sowing Jun 28 – Jul 12
Transplant May 16 – May 30
Fall sowing Jun 28 – Jul 12
Fall sowing Jun 28 – Jul 12
Fall sowing Aug 9 – Aug 30
Fall sowing Jul 12 – Jul 26
Plant May 9 – May 23
Based on the average last frost (Jun 6) and first frost (Sep 20). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.