Colfax, CA 95924 Frost Dates
Frost dates for Colfax, CA, ZIP 95924
The last spring frost here typically falls around 05/22, about 267 days from today. The first fall frost typically arrives around 10/16, about 147 frost-free days later.
Zone 9a (20 to 25°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 Colfax, not a forecast for this year.
What to do before the first frost
Zone 9a around Colfax has about 7 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
05/22 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 06/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Colfax compares
About 147 days separate Colfax's last and first frost, putting it 35,917 of 40,283 ZIP codes nationally. Within CA, it ranks 2,437 of 2,555.
Learn more
zone vs. frost date explains why Zone 9a and Colfax's frost date answer different questions, and the frost range explains how to read the range around Colfax's dates instead of trusting one.