Fillmore, CA 93015 Frost Dates
When can you plant in Fillmore, CA?
The last spring frost here typically falls around 12/31, about 125 days from today. The first fall frost typically arrives around 12/28, about 365 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 Fillmore, not a forecast for this year.
What to do before the first frost
About 17 weeks of growing season left in Fillmore before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 12/31 isn't a guarantee
12/31 is the middle of 30 years of NOAA records, not a promise. Plant by 02/02 and you're betting against frost in roughly 9 years out of 10. 12/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Fillmore compares
About 365 days separate Fillmore's last and first frost, putting it 1,507 of 40,283 ZIP codes nationally. Within CA, it ranks 776 of 2,555.
Learn more
local microclimates covers what one yard in Fillmore can differ from the 93015 normal. zone vs. frost date covers why Zone 10a and Fillmore's frost date answer different questions.