Riverbank, CA 95356 Frost Dates
Frost dates for Riverbank, CA, ZIP 95356
Around 01/31 is the usual last spring frost, about 156 days away. 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.
The actual range around Riverbank'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 Riverbank compares
At roughly 312 frost-free days, Riverbank places 3,478 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,450 of 2,555.
Learn more
local microclimates explains what one yard in Riverbank can differ from the 95356 normal, and zone vs. frost date explains why Zone 9b and Riverbank's frost date answer different questions.