Aliso Viejo, CA 92656 Frost Dates
Frost dates for Aliso Viejo, CA, ZIP 92656
The last spring frost here typically falls around 01/06, about 131 days from today. The first fall frost typically arrives around 01/02, 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 Aliso Viejo, not a forecast for this year.
What to do before the first frost
Zone 10b around Aliso Viejo 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 Aliso Viejo compares
Aliso Viejo's growing season runs about 365 days, ranking 892 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 361 of 2,555.
Learn more
zone vs. frost date explains why Zone 10b and Aliso Viejo's frost date answer different questions, and the frost range explains how to read the range around Aliso Viejo's dates instead of trusting one.