San Fernando, CA 91406 Frost Dates
When can you plant in San Fernando, CA?
The last spring frost here typically falls around 12/31, about 125 days from today. The first fall frost typically arrives around 12/30, 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
About 18 weeks of growing season left in San Fernando before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 12/31 isn't a guarantee
12/31 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. 12/09 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 1,197 of 40,283 ZIP codes in this dataset. Within CA, it ranks 518 of 2,555.
Learn more
the frost range covers how to read the range around San Fernando's dates instead of trusting one. local microclimates covers what one yard in San Fernando can differ from the 91406 normal.