Stockton, CA 95203 Frost Dates
Frost dates for Stockton, CA, ZIP 95203
The last spring frost here typically falls around 02/05, about 161 days from today. The first fall frost typically arrives around 12/08, about 305 frost-free days later.
Stockton 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 Stockton 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.
Why 02/05 isn't a guarantee
02/05 is the middle of 30 years of NOAA records, not a promise. Plant by 03/11 and you're betting against frost in roughly 9 years out of 10. 12/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Stockton compares
At roughly 305 frost-free days, Stockton places 3,718 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,503 of 2,555.
Learn more
local microclimates explains what one yard in Stockton can differ from the 95203 normal, and zone vs. frost date explains why Zone 9b and Stockton's frost date answer different questions.