Santa Clarita, CA 91387 Frost Dates
When can you plant in Santa Clarita, CA?
The last spring frost here typically falls around 01/08, about 133 days from today. The first fall frost typically arrives around 01/01, about 365 frost-free days later.
Zone 9b (25 to 30°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Santa Clarita, not a forecast for this year.
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.
Why 01/08 isn't a guarantee
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 347 of 40,283 ZIP codes in this dataset. Within CA, it ranks 110 of 2,555.
Learn more
zone vs. frost date covers why Zone 9b and Santa Clarita's frost date answer different questions. the frost range covers how to read the range around Santa Clarita's dates instead of trusting one.