Frost Dates for Manteca, CA
In Manteca, CA, the average last spring frost is around Feb 6 and the average first fall frost around Dec 1, for a growing season of about 304 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 Stockton Metro Airport, CA weather station, 7 miles away, elevation 26 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 15 |
| 20% | Feb 23 | Nov 20 |
| 30% | Feb 17 | Nov 24 |
| 40% | Feb 11 | Nov 27 |
| 50% | Feb 6 | Dec 1 |
| 60% | Jan 31 | Dec 3 |
| 70% | Jan 24 | Dec 7 |
| 80% | Jan 14 | Dec 13 |
| 90% | Dec 31 | Dec 26 |
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 10 | Nov 18 |
| Frost / freeze (32°F) | Feb 6 | Dec 1 |
| Hard freeze (28°F) | Jan 10 | Dec 16 |
Planting calendar for Manteca
Transplant Feb 13 – Feb 27
Transplant Feb 20 – Mar 6
Transplant Feb 20 – Mar 6
Transplant Feb 13 – Feb 27
Sow or transplant Feb 13 – Feb 27
Sow or transplant Feb 13 – Feb 27
Sow or transplant Feb 20 – Mar 6
Sow or transplant Jan 9 – Jan 23
Fall sowing Oct 6 – Nov 3
Fall sowing Oct 6 – Oct 27
Fall sowing Sep 22 – Oct 6
Sow or transplant Jan 9 – Jan 23
Fall sowing Sep 22 – Oct 20
Transplant Jan 23 – Feb 6
Fall sowing Sep 8 – Sep 22
Transplant Jan 16 – Jan 30
Fall sowing Sep 8 – Sep 22
Fall sowing Sep 8 – Sep 22
Fall sowing Oct 20 – Nov 10
Fall sowing Sep 22 – Oct 6
Plant Jan 9 – Jan 23
Based on the average last frost (Feb 6) and first frost (Dec 1). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.