Lathrop, CA 95241 Frost Dates
Lathrop, CA: when does the frost end?
Around 02/06 is the usual last spring frost, about 162 days away. Fall's first freeze usually shows up around 12/01, roughly 304 days after the last spring frost.
Lathrop sits in USDA Zone 9a (20 to 25°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
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
At roughly 304 frost-free days, Lathrop places 3,756 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,521 of 2,555.
Learn more
Before leaning on 95241's figures: local microclimates explains what one yard in Lathrop can differ from the 95241 normal, while zone vs. frost date explains why Zone 9a and Lathrop's frost date answer different questions.