Buellton, CA 93427 Frost Dates
Frost dates for Buellton, CA, ZIP 93427
Around 04/11 is the usual last spring frost, about 226 days away. The first fall frost typically arrives around 11/08, about 209 frost-free days later.
Buellton sits in USDA Zone 10a (30 to 35°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 10a around Buellton has about 10 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
04/11 is the middle of 30 years of NOAA records, not a promise. Plant by 03/14 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Buellton compares
About 209 days separate Buellton's last and first frost, putting it 15,217 of 40,283 ZIP codes nationally. Within CA, it ranks 2,232 of 2,555.
Learn more
local microclimates explains what one yard in Buellton can differ from the 93427 normal, and zone vs. frost date explains why Zone 10a and Buellton's frost date answer different questions.