Frost Dates for Twentynine Palms, CA
In Twentynine Palms, CA, the average last spring frost is around Jan 24 and the average first fall frost around Dec 10, for a growing season of about 321 days. For frost-tender plants, wait until Feb 22, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Twentynine Palms, CA weather station, 2 miles away, elevation 1,975 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% | Feb 22 | Nov 24 |
| 20% | Feb 13 | Nov 29 |
| 30% | Feb 6 | Dec 3 |
| 40% | Jan 31 | Dec 7 |
| 50% | Jan 24 | Dec 10 |
| 60% | Jan 14 | Dec 14 |
| 70% | Jan 6 | Dec 18 |
| 80% | Jan 1 | Dec 24 |
| 90% | Dec 22 | Jan 1 |
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) | Feb 19 | Nov 27 |
| Frost / freeze (32°F) | Jan 24 | Dec 10 |
| Hard freeze (28°F) | Jan 3 | Dec 23 |
Planting calendar for Twentynine Palms
Transplant Jan 31 – Feb 14
Transplant Feb 7 – Feb 21
Transplant Feb 7 – Feb 21
Transplant Jan 31 – Feb 14
Sow or transplant Jan 31 – Feb 14
Sow or transplant Jan 31 – Feb 14
Sow or transplant Feb 7 – Feb 21
Sow or transplant Dec 27 – Jan 10
Fall sowing Oct 15 – Nov 12
Fall sowing Oct 15 – Nov 5
Fall sowing Oct 1 – Oct 15
Sow or transplant Dec 27 – Jan 10
Fall sowing Oct 1 – Oct 29
Transplant Jan 10 – Jan 24
Fall sowing Sep 17 – Oct 1
Transplant Jan 3 – Jan 17
Fall sowing Sep 17 – Oct 1
Fall sowing Sep 17 – Oct 1
Fall sowing Oct 29 – Nov 19
Fall sowing Oct 1 – Oct 15
Plant Dec 27 – Jan 10
Based on the average last frost (Jan 24) and first frost (Dec 10). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.