Frost Dates for Santa Clarita, CA
In Santa Clarita, CA, the average last spring frost is around Jan 8 and the average first fall frost around Jan 1, for a growing season of about 365 days. For frost-tender plants, wait until Mar 10, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Newhall 5Nw, CA weather station, 6 miles away, elevation 1,765 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% | Mar 10 | Nov 30 |
| 20% | Feb 17 | Dec 10 |
| 30% | Jan 26 | Dec 20 |
| 40% | Jan 16 | Dec 28 |
| 50% | Jan 8 | Jan 1 |
| 60% | Jan 1 | Jan 4 |
| 70% | Dec 29 | Jan 12 |
| 80% | Dec 17 | Jan 25 |
| 90% | Dec 8 | Feb 25 |
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 22 | Dec 19 |
| Frost / freeze (32°F) | Jan 8 | Jan 1 |
| Hard freeze (28°F) | — | — |
Planting calendar for Santa Clarita
Transplant Jan 15 – Jan 29
Transplant Jan 22 – Feb 5
Transplant Jan 22 – Feb 5
Transplant Jan 15 – Jan 29
Sow or transplant Jan 15 – Jan 29
Sow or transplant Jan 15 – Jan 29
Sow or transplant Jan 22 – Feb 5
Sow or transplant Dec 11 – Dec 25
Fall sowing Nov 6 – Dec 4
Fall sowing Nov 6 – Nov 27
Fall sowing Oct 23 – Nov 6
Sow or transplant Dec 11 – Dec 25
Fall sowing Oct 23 – Nov 20
Transplant Dec 25 – Jan 8
Fall sowing Oct 9 – Oct 23
Transplant Dec 18 – Jan 1
Fall sowing Oct 9 – Oct 23
Fall sowing Oct 9 – Oct 23
Fall sowing Nov 20 – Dec 11
Fall sowing Oct 23 – Nov 6
Plant Dec 11 – Dec 25
Based on the average last frost (Jan 8) and first frost (Jan 1). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.