Patterson, CA 95363 Frost Dates
Frost dates for Patterson, CA, ZIP 95363
Typically, the last spring freeze lands around 01/31, roughly 156 days out. 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.
How much risk comes with planting early here
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 3,481 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,453 of 2,555.
Learn more
the frost range explains how to read the range around Patterson's dates instead of trusting one, and local microclimates explains what one yard in Patterson can differ from the 95363 normal.