Santa Clarita, CA 91321 Frost Dates
When can you plant in Santa Clarita, CA?
Typically, the last spring freeze lands around 01/08, roughly 133 days out. The first fall frost typically arrives around 01/01, about 365 frost-free days later.
Santa Clarita sits in USDA Zone 10a (30 to 35°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 18 weeks of growing season left in Santa Clarita before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Santa Clarita's last frost
01/08 is the middle of 30 years of NOAA records, not a promise. Plant by 03/10 and you're betting against frost in roughly 9 years out of 10. 12/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Santa Clarita compares
At roughly 365 frost-free days, Santa Clarita places 340 of 40,283 ZIP codes in this dataset. Within CA, it ranks 103 of 2,555.
Learn more
the frost range covers how to read the range around Santa Clarita's dates instead of trusting one. local microclimates covers what one yard in Santa Clarita can differ from the 91321 normal.