Loma Linda, CA 92408 Frost Dates
92408, near Loma Linda, CA: the frost window
The last spring frost here typically falls around 01/27, about 152 days from today. Fall's first freeze usually shows up around 12/19, roughly 329 days after the last spring frost.
Zone 10a (30 to 35°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 Loma Linda, not a forecast for this year.
Stretching the season past the first frost
Loma Linda's growing season runs out in roughly 16 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
01/27 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 12/21 and only about 1 year in 10 sees frost after that.
Loma Linda against the rest of the dataset
Loma Linda's growing season runs about 329 days, ranking 3,089 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,342 of 2,555.
Learn more
Two guides worth reading on 92408: the frost range, on how to read the range around Loma Linda's dates instead of trusting one, and local microclimates, on what one yard in Loma Linda can differ from the 92408 normal.