San Leandro, CA 94578 Frost Dates
San Leandro, CA: when does the frost end?
Typically, the last spring freeze lands around 01/02, roughly 127 days out. Fall's first freeze usually shows up around 12/25, roughly 365 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts San Leandro 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 17 weeks until San Leandro's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around San Leandro's last frost
01/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/13 and only about 1 year in 10 sees frost after that.
San Leandro against the rest of the dataset
At roughly 365 frost-free days, San Leandro places 607 of 40,283 ZIP codes in this dataset. Within CA, it ranks 277 of 2,555.
Learn more
Before leaning on 94578's figures: the frost range explains how to read the range around San Leandro's dates instead of trusting one, while local microclimates explains what one yard in San Leandro can differ from the 94578 normal.