Irvine, CA 92619 Frost Dates
Frost dates for Irvine, CA, ZIP 92619
Around 01/05 is the usual last spring frost, about 130 days away. The first fall frost typically arrives around 12/25, about 365 frost-free days later.
Zone 10b (35 to 40°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 Irvine, not a forecast for this year.
What to do before the first frost
Zone 10b around Irvine has about 17 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.
The actual range around Irvine's last frost
01/05 is the middle of 30 years of NOAA records, not a promise. Plant by 02/02 and you're betting against frost in roughly 9 years out of 10. 12/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Irvine compares
At roughly 365 frost-free days, Irvine places 255 of 40,283 ZIP codes in this dataset. Within CA, it ranks 50 of 2,555.
Learn more
the frost range explains how to read the range around Irvine's dates instead of trusting one, and local microclimates explains what one yard in Irvine can differ from the 92619 normal.