Patterson, CA 95385 Frost Dates
Frost dates for Patterson, CA, ZIP 95385
The last spring frost here typically falls around 01/31, about 156 days from today. The first fall frost typically arrives around 12/05, about 312 frost-free days later.
Patterson sits in USDA Zone 9b (25 to 30°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 9b around Patterson has about 14 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 Patterson's last frost
01/31 is the middle of 30 years of NOAA records, not a promise. Plant by 02/25 and you're betting against frost in roughly 9 years out of 10. 12/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Patterson compares
At roughly 312 frost-free days, Patterson places 3,482 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,454 of 2,555.
Learn more
local microclimates explains what one yard in Patterson can differ from the 95385 normal, and zone vs. frost date explains why Zone 9b and Patterson's frost date answer different questions.