San Fernando, CA 91345 Frost Dates
When can you plant in San Fernando, CA?
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.
Zone 10a (30 to 35°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 San Fernando, not a forecast for this year.
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.
The actual range around San Fernando's last frost
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
San Fernando's growing season runs about 365 days, ranking 1,194 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 515 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 91345 normal.