San Clemente, CA 92674 Frost Dates
Frost dates for San Clemente, CA, ZIP 92674
Typically, the last spring freeze lands around 01/06, roughly 131 days out. The first fall frost typically arrives around 01/02, 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 Clemente, not a forecast for this year.
What to do before the first frost
Zone 10a around San Clemente 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
01/06 is the middle of 30 years of NOAA records, not a promise. Plant by 02/11 and you're betting against frost in roughly 9 years out of 10. 12/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How San Clemente compares
At roughly 365 frost-free days, San Clemente places 761 of 40,283 ZIP codes in this dataset. Within CA, it ranks 321 of 2,555.
Learn more
the frost range explains how to read the range around San Clemente's dates instead of trusting one, and local microclimates explains what one yard in San Clemente can differ from the 92674 normal.