Modesto, CA 95355 Frost Dates
Frost dates for Modesto, CA, ZIP 95355
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.
Zone 9b (25 to 30°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Modesto, not a forecast for this year.
What to do before the first frost
Zone 9b around Modesto 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 Modesto'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 Modesto compares
Modesto's growing season runs about 312 days, ranking 3,463 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,443 of 2,555.
Learn more
the frost range explains how to read the range around Modesto's dates instead of trusting one, and local microclimates explains what one yard in Modesto can differ from the 95355 normal.