Rolling Hills, CA 90731 Frost Dates
When can you plant in Rolling Hills, CA?
The last spring frost here typically falls around 01/09, about 134 days from today. The first fall frost typically arrives around 01/05, about 365 frost-free days later.
The USDA Plant Hardiness Zone Map puts Rolling Hills in Zone 10b (35 to 40°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 19 weeks of growing season left in Rolling Hills before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 01/09 isn't a guarantee
01/09 is the middle of 30 years of NOAA records, not a promise. Plant by 02/24 and you're betting against frost in roughly 9 years out of 10. 12/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Rolling Hills compares
At roughly 365 frost-free days, Rolling Hills places 1,964 of 40,283 ZIP codes in this dataset. Within CA, it ranks 896 of 2,555.
Learn more
local microclimates covers what one yard in Rolling Hills can differ from the 90731 normal. zone vs. frost date covers why Zone 10b and Rolling Hills's frost date answer different questions.