King City, CA 93450 Frost Dates
Frost dates for King City, CA, ZIP 93450
Typically, the last spring freeze lands around 05/08, roughly 253 days out. The first fall frost typically arrives around 10/22, about 165 frost-free days later.
Zone 9a (20 to 25°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 King City, not a forecast for this year.
What to do before the first frost
Zone 9a around King City has about 8 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 05/08 isn't a guarantee
05/08 is the middle of 30 years of NOAA records, not a promise. Plant by 04/20 and you're betting against frost in roughly 9 years out of 10. 05/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How King City compares
King City's growing season runs about 165 days, ranking 30,518 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,411 of 2,555.
Learn more
the frost range explains how to read the range around King City's dates instead of trusting one, and local microclimates explains what one yard in King City can differ from the 93450 normal.