Grand Terrace, CA 92313 Frost Dates
92313, near Grand Terrace, CA: the frost window
Typically, the last spring freeze lands around 01/10, roughly 135 days out. Fall's first freeze usually shows up around 01/02, roughly 365 days after the last spring frost.
Grand Terrace sits in USDA Zone 10a (30 to 35°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
Grand Terrace's growing season runs out in roughly 18 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 01/10 isn't a guarantee
01/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/20 and only about 1 year in 10 sees frost after that.
Grand Terrace against the rest of the dataset
Grand Terrace's growing season runs about 365 days, ranking 1,685 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 819 of 2,555.
Learn more
Two guides worth reading on 92313: the frost range, on how to read the range around Grand Terrace's dates instead of trusting one, and local microclimates, on what one yard in Grand Terrace can differ from the 92313 normal.