Hidden Hills, CA 91335 Frost Dates
Frost dates for Hidden Hills, CA, ZIP 91335
The last spring frost here typically falls around 01/24, about 149 days from today. The first fall frost typically arrives around 12/15, about 329 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 Hidden Hills, not a forecast for this year.
What to do before the first frost
Zone 10a around Hidden Hills has about 16 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 Hidden Hills's last frost
01/24 is the middle of 30 years of NOAA records, not a promise. Plant by 03/05 and you're betting against frost in roughly 9 years out of 10. 12/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hidden Hills compares
At roughly 329 frost-free days, Hidden Hills places 3,130 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,354 of 2,555.
Learn more
local microclimates explains what one yard in Hidden Hills can differ from the 91335 normal, and zone vs. frost date explains why Zone 10a and Hidden Hills's frost date answer different questions.