Hidden Hills, CA 91306 Frost Dates
When can you plant in Hidden Hills, CA?
Typically, the last spring freeze lands around 01/24, roughly 149 days out. The first fall frost typically arrives around 12/15, about 329 frost-free days later.
Hidden Hills sits in USDA Zone 10a (30 to 35°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
About 16 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
01/24 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 3,128 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,352 of 2,555.
Learn more
zone vs. frost date covers why Zone 10a and Hidden Hills's frost date answer different questions. the frost range covers how to read the range around Hidden Hills's dates instead of trusting one.