Pleasanton, CA 94666 Frost Dates
When can you plant in Pleasanton, CA?
Typically, the last spring freeze lands around 02/15, roughly 171 days out. The first fall frost typically arrives around 12/02, about 292 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 Pleasanton, not a forecast for this year.
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.
The actual range around Pleasanton's last frost
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
Pleasanton's growing season runs about 292 days, ranking 4,338 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,694 of 2,555.
Learn more
local microclimates covers what one yard in Pleasanton can differ from the 94666 normal. zone vs. frost date covers why Zone 10a and Pleasanton's frost date answer different questions.