Lemon Grove, CA 91977 Frost Dates
When can you plant in Lemon Grove, CA?
Typically, the last spring freeze lands around 01/06, roughly 131 days out. The first fall frost typically arrives around 12/21, about 350 frost-free days later.
The USDA Plant Hardiness Zone Map puts Lemon Grove in Zone 10b (35 to 40°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 16 weeks of growing season left in Lemon Grove before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
01/06 is the middle of 30 years of NOAA records, not a promise. Plant by 02/07 and you're betting against frost in roughly 9 years out of 10. 12/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lemon Grove compares
Lemon Grove's growing season runs about 350 days, ranking 2,327 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,033 of 2,555.
Learn more
local microclimates covers what one yard in Lemon Grove can differ from the 91977 normal. zone vs. frost date covers why Zone 10b and Lemon Grove's frost date answer different questions.