Pleasanton, CA 94649 Frost Dates
Pleasanton, CA: when does the frost end?
Typically, the last spring freeze lands around 02/15, roughly 171 days out. Fall's first freeze usually shows up around 12/02, roughly 292 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 14 weeks until Pleasanton's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
02/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/13 and only about 1 year in 10 sees frost after that.
Pleasanton against the rest of the dataset
About 292 days separate Pleasanton's last and first frost, putting it 4,333 of 40,283 ZIP codes nationally. Within CA, it ranks 1,689 of 2,555.
Learn more
Before leaning on 94649's figures: the frost range explains how to read the range around Pleasanton's dates instead of trusting one, while local microclimates explains what one yard in Pleasanton can differ from the 94649 normal.