Hidden Hills, CA 91311 Frost Dates
When can you plant in Hidden Hills, CA?
Typically, the last spring freeze lands around 01/02, roughly 127 days out. The first fall frost typically arrives around 01/01, about 365 frost-free days later.
The USDA Plant Hardiness Zone Map puts Hidden Hills in Zone 10a (30 to 35°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 18 weeks of growing season left in Hidden Hills before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
01/02 is the middle of 30 years of NOAA records, not a promise. Plant by 01/27 and you're betting against frost in roughly 9 years out of 10. 12/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hidden Hills compares
At roughly 365 frost-free days, Hidden Hills places 1,961 of 40,283 ZIP codes in this dataset. Within CA, it ranks 893 of 2,555.
Learn more
the frost range covers how to read the range around Hidden Hills's dates instead of trusting one. local microclimates covers what one yard in Hidden Hills can differ from the 91311 normal.