Eureka, CA 95501 Frost Dates
95501, near Eureka, CA: the frost window
Typically, the last spring freeze lands around 02/22, roughly 178 days out. Fall's first freeze usually shows up around 12/07, roughly 293 days after the last spring frost.
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.
Stretching the season past the first frost
Eureka's growing season runs out in roughly 14 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
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
Eureka's growing season runs about 293 days, ranking 4,277 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,653 of 2,555.
Learn more
Two guides worth reading on 95501: the frost range, on how to read the range around Eureka's dates instead of trusting one, and local microclimates, on what one yard in Eureka can differ from the 95501 normal.