Lathrop, CA 95296 Frost Dates
Lathrop, CA: when does the frost end?
Typically, the last spring freeze lands around 02/06, roughly 162 days out. Fall's first freeze usually shows up around 12/01, roughly 304 days after the last spring frost.
Zone 9b (25 to 30°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 Lathrop, not a forecast for this year.
Stretching the season past the first frost
With roughly 14 weeks until Lathrop's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Lathrop's last frost
02/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/31 and only about 1 year in 10 sees frost after that.
Lathrop against the rest of the dataset
About 304 days separate Lathrop's last and first frost, putting it 3,759 of 40,283 ZIP codes nationally. Within CA, it ranks 1,524 of 2,555.
Learn more
Before leaning on 95296's figures: local microclimates explains what one yard in Lathrop can differ from the 95296 normal, while zone vs. frost date explains why Zone 9b and Lathrop's frost date answer different questions.