Oceanside, CA 92057 Frost Dates
Frost dates for Oceanside, CA, ZIP 92057
The last spring frost here typically falls around 01/23, about 148 days from today. The first fall frost typically arrives around 12/11, about 325 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 Oceanside, not a forecast for this year.
What to do before the first frost
Zone 10a around Oceanside has about 15 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
01/23 is the middle of 30 years of NOAA records, not a promise. Plant by 02/22 and you're betting against frost in roughly 9 years out of 10. 12/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Oceanside compares
At roughly 325 frost-free days, Oceanside places 3,213 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,375 of 2,555.
Learn more
the frost range explains how to read the range around Oceanside's dates instead of trusting one, and local microclimates explains what one yard in Oceanside can differ from the 92057 normal.