Williams, CA 95679 Frost Dates
When can you plant in Williams, CA?
Around 04/10 is the usual last spring frost, about 225 days away. The first fall frost typically arrives around 11/06, about 209 frost-free days later.
The USDA Plant Hardiness Zone Map puts Williams in Zone 9b (25 to 30°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 10 weeks of growing season left in Williams before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Williams's last frost
04/10 is the middle of 30 years of NOAA records, not a promise. Plant by 03/24 and you're betting against frost in roughly 9 years out of 10. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Williams compares
At roughly 209 frost-free days, Williams places 15,209 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,229 of 2,555.
Learn more
the frost range covers how to read the range around Williams's dates instead of trusting one. local microclimates covers what one yard in Williams can differ from the 95679 normal.