Frost Dates for Beaumont, CA
In Beaumont, CA, the average last spring frost is around Jan 31 and the average first fall frost around Dec 10, for a growing season of about 315 days. For frost-tender plants, wait until Feb 28, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the San Jacinto, CA weather station, 6 miles away, elevation 1,525 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 28 | Nov 22 |
| 20% | Feb 21 | Nov 29 |
| 30% | Feb 14 | Dec 2 |
| 40% | Feb 6 | Dec 6 |
| 50% | Jan 31 | Dec 10 |
| 60% | Jan 25 | Dec 14 |
| 70% | Jan 17 | Dec 18 |
| 80% | Jan 6 | Dec 26 |
| 90% | Dec 31 | Jan 6 |
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) | Mar 5 | Nov 24 |
| Frost / freeze (32°F) | Jan 31 | Dec 10 |
| Hard freeze (28°F) | Jan 3 | Dec 21 |
Planting calendar for Beaumont
Transplant Feb 7 – Feb 21
Transplant Feb 14 – Feb 28
Transplant Feb 14 – Feb 28
Transplant Feb 7 – Feb 21
Sow or transplant Feb 7 – Feb 21
Sow or transplant Feb 7 – Feb 21
Sow or transplant Feb 14 – Feb 28
Sow or transplant Jan 3 – Jan 17
Fall sowing Oct 15 – Nov 12
Fall sowing Oct 15 – Nov 5
Fall sowing Oct 1 – Oct 15
Sow or transplant Jan 3 – Jan 17
Fall sowing Oct 1 – Oct 29
Transplant Jan 17 – Jan 31
Fall sowing Sep 17 – Oct 1
Transplant Jan 10 – Jan 24
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 Jan 3 – Jan 17
Based on the average last frost (Jan 31) and first frost (Dec 10). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.