Lomita, CA 91209 Frost Dates
91209, near Lomita, CA: the frost window
Around 01/09 is the usual last spring frost, about 134 days away. Fall's first freeze usually shows up around 01/05, roughly 365 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Lomita 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
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.
The actual range around Lomita's last frost
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
Lomita's growing season runs about 365 days, ranking 1,383 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 668 of 2,555.
Learn more
Two guides worth reading on 91209: local microclimates, on what one yard in Lomita can differ from the 91209 normal, and zone vs. frost date, on why Zone 10a and Lomita's frost date answer different questions.