Pismo Beach, CA 93449 Frost Dates
93449, near Pismo Beach, CA: the frost window
The last spring frost here typically falls around 02/01, about 157 days from today. Fall's first freeze usually shows up around 01/04, roughly 362 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Pismo Beach in Zone 10a (30 to 35°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Pismo Beach's growing season runs out in roughly 18 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 02/01 isn't a guarantee
02/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/18 and only about 1 year in 10 sees frost after that.
Pismo Beach against the rest of the dataset
At roughly 362 frost-free days, Pismo Beach places 2,078 of 40,283 ZIP codes in this dataset. Within CA, it ranks 960 of 2,555.
Learn more
Two guides worth reading on 93449: zone vs. frost date, on why Zone 10a and Pismo Beach's frost date answer different questions, and the frost range, on how to read the range around Pismo Beach's dates instead of trusting one.