San Clemente, CA 92673 Frost Dates
San Clemente, CA: when does the frost end?
Around 01/06 is the usual last spring frost, about 131 days away. Fall's first freeze usually shows up around 01/02, roughly 365 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts San Clemente in Zone 10b (35 to 40°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
With roughly 18 weeks until San Clemente's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 01/06 isn't a guarantee
01/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/13 and only about 1 year in 10 sees frost after that.
San Clemente against the rest of the dataset
At roughly 365 frost-free days, San Clemente places 760 of 40,283 ZIP codes in this dataset. Within CA, it ranks 320 of 2,555.
Learn more
Before leaning on 92673's figures: local microclimates explains what one yard in San Clemente can differ from the 92673 normal, while zone vs. frost date explains why Zone 10b and San Clemente's frost date answer different questions.