Grand Terrace, CA 92507 Frost Dates
When can you plant in Grand Terrace, CA?
Around 01/10 is the usual last spring frost, about 135 days away. The first fall frost typically arrives around 01/02, about 365 frost-free days later.
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 Grand Terrace, not a forecast for this year.
What to do before the first frost
About 18 weeks of growing season left in Grand Terrace before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Grand Terrace's last frost
01/10 is the middle of 30 years of NOAA records, not a promise. Plant by 02/17 and you're betting against frost in roughly 9 years out of 10. 12/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Grand Terrace compares
At roughly 365 frost-free days, Grand Terrace places 1,686 of 40,283 ZIP codes in this dataset. Within CA, it ranks 820 of 2,555.
Learn more
the frost range covers how to read the range around Grand Terrace's dates instead of trusting one. local microclimates covers what one yard in Grand Terrace can differ from the 92507 normal.