Irvine, CA 92606 Frost Dates
Frost dates for Irvine, CA, ZIP 92606
The last spring frost here typically falls around 01/05, about 130 days from today. The first fall frost typically arrives around 12/25, about 365 frost-free days later.
Irvine sits in USDA Zone 10b (35 to 40°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
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.
Why 01/05 isn't a guarantee
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
About 365 days separate Irvine's last and first frost, putting it 249 of 40,283 ZIP codes nationally. Within CA, it ranks 44 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 92606 normal.