Pleasanton, CA 94659 Frost Dates
Frost dates for Pleasanton, CA, ZIP 94659
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.
The USDA Plant Hardiness Zone Map puts Pleasanton in Zone 10a (30 to 35°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
Zone 10a around Pleasanton has about 14 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
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
About 292 days separate Pleasanton's last and first frost, putting it 4,334 of 40,283 ZIP codes nationally. Within CA, it ranks 1,690 of 2,555.
Learn more
zone vs. frost date explains why Zone 10a and Pleasanton's frost date answer different questions, and the frost range explains how to read the range around Pleasanton's dates instead of trusting one.