San Fernando, CA 91325 Frost Dates
Frost dates for San Fernando, CA, ZIP 91325
The last spring frost here typically falls around 01/02, about 127 days from today. The first fall frost typically arrives around 01/01, about 365 frost-free days later.
The USDA Plant Hardiness Zone Map puts San Fernando 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 San Fernando 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.
How much risk comes with planting early here
01/02 is the middle of 30 years of NOAA records, not a promise. Plant by 01/27 and you're betting against frost in roughly 9 years out of 10. 12/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How San Fernando compares
At roughly 365 frost-free days, San Fernando places 1,187 of 40,283 ZIP codes in this dataset. Within CA, it ranks 508 of 2,555.
Learn more
local microclimates explains what one yard in San Fernando can differ from the 91325 normal, and zone vs. frost date explains why Zone 10a and San Fernando's frost date answer different questions.