Trinidad, CA 95546 Frost Dates
Frost dates for Trinidad, CA, ZIP 95546
The last spring frost here typically falls around 03/12, about 196 days from today. The first fall frost typically arrives around 11/26, about 262 frost-free days later.
The USDA Plant Hardiness Zone Map puts Trinidad in Zone 9a (20 to 25°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 9a around Trinidad 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
03/12 is the middle of 30 years of NOAA records, not a promise. Plant by 01/26 and you're betting against frost in roughly 9 years out of 10. 04/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Trinidad compares
About 262 days separate Trinidad's last and first frost, putting it 6,248 of 40,283 ZIP codes nationally. Within CA, it ranks 2,033 of 2,555.
Learn more
zone vs. frost date explains why Zone 9a and Trinidad's frost date answer different questions, and the frost range explains how to read the range around Trinidad's dates instead of trusting one.