San Gabriel, CA 91776 Frost Dates
San Gabriel, CA: when does the frost end?
Around 01/04 is the usual last spring frost, about 129 days away. Fall's first freeze usually shows up around 01/02, roughly 365 days after the last spring frost.
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 San Gabriel, not a forecast for this year.
Stretching the season past the first frost
With roughly 18 weeks until San Gabriel's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 01/04 isn't a guarantee
01/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/19 and only about 1 year in 10 sees frost after that.
San Gabriel against the rest of the dataset
About 365 days separate San Gabriel's last and first frost, putting it 989 of 40,283 ZIP codes nationally. Within CA, it ranks 416 of 2,555.
Learn more
Before leaning on 91776's figures: the frost range explains how to read the range around San Gabriel's dates instead of trusting one, while local microclimates explains what one yard in San Gabriel can differ from the 91776 normal.