Riverbank, CA 95367 Frost Dates
Frost dates for Riverbank, CA, ZIP 95367
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.
The USDA Plant Hardiness Zone Map puts Riverbank 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 Riverbank 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.
Why 01/31 isn't a guarantee
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 Riverbank compares
About 312 days separate Riverbank's last and first frost, putting it 3,480 of 40,283 ZIP codes nationally. Within CA, it ranks 1,452 of 2,555.
Learn more
the frost range explains how to read the range around Riverbank's dates instead of trusting one, and local microclimates explains what one yard in Riverbank can differ from the 95367 normal.