Pleasanton, CA 94543 Frost Dates
When can you plant in Pleasanton, CA?
Around 02/15 is the usual last spring frost, about 171 days away. The first fall frost typically arrives around 12/02, about 292 frost-free days later.
Pleasanton 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 14 weeks of growing season left in Pleasanton before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 02/15 isn't a guarantee
02/15 is the middle of 30 years of NOAA records, not a promise. Plant by 01/12 and you're betting against frost in roughly 9 years out of 10. 03/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Pleasanton compares
At roughly 292 frost-free days, Pleasanton places 4,323 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,679 of 2,555.
Learn more
local microclimates covers what one yard in Pleasanton can differ from the 94543 normal. zone vs. frost date covers why Zone 10a and Pleasanton's frost date answer different questions.