Auburn, CA 95658 Frost Dates
Frost dates for Auburn, CA, ZIP 95658
Typically, the last spring freeze lands around 04/03, roughly 218 days out. The first fall frost typically arrives around 11/24, about 233 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 Auburn, not a forecast for this year.
What to do before the first frost
Zone 9b around Auburn has about 13 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
04/03 is the middle of 30 years of NOAA records, not a promise. Plant by 02/28 and you're betting against frost in roughly 9 years out of 10. 04/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Auburn compares
Auburn's growing season runs about 233 days, ranking 9,866 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,158 of 2,555.
Learn more
local microclimates explains what one yard in Auburn can differ from the 95658 normal, and zone vs. frost date explains why Zone 9b and Auburn's frost date answer different questions.