Torrance, CA 90503 Frost Dates
90503, near Torrance, 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 Torrance, not a forecast for this year.
Stretching the season past the first frost
Torrance'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.
Torrance against the rest of the dataset
About 365 days separate Torrance's last and first frost, putting it 413 of 40,283 ZIP codes nationally. Within CA, it ranks 156 of 2,555.
Learn more
Two guides worth reading on 90503: local microclimates, on what one yard in Torrance can differ from the 90503 normal, and zone vs. frost date, on why Zone 10b and Torrance's frost date answer different questions.