Hidden Hills, CA 91307 Frost Dates
Hidden Hills, CA: when does the frost end?
The last spring frost here typically falls around 01/24, about 149 days from today. Fall's first freeze usually shows up around 12/15, roughly 329 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 16 weeks until Hidden Hills's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
01/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/21 and only about 1 year in 10 sees frost after that.
Hidden Hills against the rest of the dataset
At roughly 329 frost-free days, Hidden Hills places 3,129 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,353 of 2,555.
Learn more
Before leaning on 91307's figures: local microclimates explains what one yard in Hidden Hills can differ from the 91307 normal, while zone vs. frost date explains why Zone 10a and Hidden Hills's frost date answer different questions.