Kingsburg, CA 93631 Frost Dates
Frost dates for Kingsburg, CA, ZIP 93631
Typically, the last spring freeze lands around 02/20, roughly 176 days out. The first fall frost typically arrives around 11/23, about 276 frost-free days later.
The USDA Plant Hardiness Zone Map puts Kingsburg 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
Zone 9b around Kingsburg has about 12 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.
The actual range around Kingsburg's last frost
02/20 is the middle of 30 years of NOAA records, not a promise. Plant by 01/18 and you're betting against frost in roughly 9 years out of 10. 03/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Kingsburg compares
Kingsburg's growing season runs about 276 days, ranking 5,071 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,819 of 2,555.
Learn more
local microclimates explains what one yard in Kingsburg can differ from the 93631 normal, and zone vs. frost date explains why Zone 9b and Kingsburg's frost date answer different questions.