Santa Clarita, CA 91381 Frost Dates
Frost dates for Santa Clarita, CA, ZIP 91381
Around 01/08 is the usual last spring frost, about 133 days away. The first fall frost typically arrives around 01/01, about 365 frost-free days later.
The USDA Plant Hardiness Zone Map puts Santa Clarita in Zone 10a (30 to 35°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 10a around Santa Clarita has about 18 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
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
About 365 days separate Santa Clarita's last and first frost, putting it 345 of 40,283 ZIP codes nationally. Within CA, it ranks 108 of 2,555.
Learn more
local microclimates explains what one yard in Santa Clarita can differ from the 91381 normal, and zone vs. frost date explains why Zone 10a and Santa Clarita's frost date answer different questions.