Dinuba, CA 93670 Frost Dates
Frost dates for Dinuba, CA, ZIP 93670
The last spring frost here typically falls around 01/23, about 148 days from today. The first fall frost typically arrives around 12/13, about 328 frost-free days later.
Zone 9b (25 to 30°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 Dinuba, not a forecast for this year.
What to do before the first frost
Zone 9b around Dinuba has about 15 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 Dinuba's last frost
01/23 is the middle of 30 years of NOAA records, not a promise. Plant by 02/27 and you're betting against frost in roughly 9 years out of 10. 12/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Dinuba compares
About 328 days separate Dinuba's last and first frost, putting it 3,184 of 40,283 ZIP codes nationally. Within CA, it ranks 1,365 of 2,555.
Learn more
local microclimates explains what one yard in Dinuba can differ from the 93670 normal, and zone vs. frost date explains why Zone 9b and Dinuba's frost date answer different questions.