Greenfield, CA 93920 Frost Dates
When can you plant in Greenfield, CA?
Typically, the last spring freeze lands around 02/13, roughly 169 days out. The first fall frost typically arrives around 12/27, about 323 frost-free days later.
The USDA Plant Hardiness Zone Map puts Greenfield 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 17 weeks of growing season left in Greenfield before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Greenfield's last frost
02/13 is the middle of 30 years of NOAA records, not a promise. Plant by 04/01 and you're betting against frost in roughly 9 years out of 10. 12/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Greenfield compares
At roughly 323 frost-free days, Greenfield places 3,257 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,387 of 2,555.
Learn more
the frost range covers how to read the range around Greenfield's dates instead of trusting one. local microclimates covers what one yard in Greenfield can differ from the 93920 normal.