Lomita, CA 91043 Frost Dates
91043, near Lomita, CA: the frost window
The last spring frost here typically falls around 01/09, about 134 days from today. Fall's first freeze usually shows up around 01/05, roughly 365 days after the last spring frost.
Zone 10b (35 to 40°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 Lomita, not a forecast for this year.
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.
How much risk comes with planting early here
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 1,361 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 646 of 2,555.
Learn more
Two guides worth reading on 91043: the frost range, on how to read the range around Lomita's dates instead of trusting one, and local microclimates, on what one yard in Lomita can differ from the 91043 normal.