Eureka, CA 95503 Frost Dates
Eureka, CA: when does the frost end?
The last spring frost here typically falls around 02/22, about 178 days from today. Fall's first freeze usually shows up around 12/07, roughly 293 days after the last spring frost.
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 Eureka, not a forecast for this year.
Stretching the season past the first frost
With roughly 14 weeks until Eureka's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Eureka's last frost
02/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/31 and only about 1 year in 10 sees frost after that.
Eureka against the rest of the dataset
At roughly 293 frost-free days, Eureka places 4,278 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,654 of 2,555.
Learn more
Before leaning on 95503's figures: local microclimates explains what one yard in Eureka can differ from the 95503 normal, while zone vs. frost date explains why Zone 9b and Eureka's frost date answer different questions.