Lomita, CA 90053 Frost Dates
90053, near Lomita, CA: the frost window
Typically, the last spring freeze lands around 01/09, roughly 134 days out. Fall's first freeze usually shows up around 01/05, roughly 365 days after the last spring frost.
Lomita sits in USDA Zone 10b (35 to 40°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
Lomita's growing season runs out in roughly 19 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 01/09 isn't a guarantee
01/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/04 and only about 1 year in 10 sees frost after that.
Lomita against the rest of the dataset
At roughly 365 frost-free days, Lomita places 1,267 of 40,283 ZIP codes in this dataset. Within CA, it ranks 552 of 2,555.
Learn more
Two guides worth reading on 90053: local microclimates, on what one yard in Lomita can differ from the 90053 normal, and zone vs. frost date, on why Zone 10b and Lomita's frost date answer different questions.