Eureka, CA 95564 Frost Dates
When can you plant in Eureka, CA?
Around 02/22 is the usual last spring frost, about 178 days away. The first fall frost typically arrives around 12/07, about 293 frost-free days later.
Eureka sits in USDA Zone 9b (25 to 30°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
About 14 weeks of growing season left in Eureka before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 02/22 isn't a guarantee
02/22 is the middle of 30 years of NOAA records, not a promise. Plant by 03/23 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 Eureka compares
About 293 days separate Eureka's last and first frost, putting it 4,280 of 40,283 ZIP codes nationally. Within CA, it ranks 1,656 of 2,555.
Learn more
the frost range covers how to read the range around Eureka's dates instead of trusting one. local microclimates covers what one yard in Eureka can differ from the 95564 normal.