Santa Maria, CA 93454 Frost Dates
Santa Maria, CA: when does the frost end?
Around 02/04 is the usual last spring frost, about 160 days away. Fall's first freeze usually shows up around 12/13, roughly 315 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 Santa Maria, not a forecast for this year.
Stretching the season past the first frost
With roughly 15 weeks until Santa Maria's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
02/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/29 and only about 1 year in 10 sees frost after that.
Santa Maria against the rest of the dataset
At roughly 315 frost-free days, Santa Maria places 3,400 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,415 of 2,555.
Learn more
Before leaning on 93454's figures: local microclimates explains what one yard in Santa Maria can differ from the 93454 normal, while zone vs. frost date explains why Zone 9b and Santa Maria's frost date answer different questions.