San Diego, CA 92123 Frost Dates
When can you plant in San Diego, CA?
The NOAA station nearest to 92123 does not report a usable frost-date normal for either event, so no last-frost or first-frost figure is shown here. The USDA hardiness zone below is still real: Zone 10b (35 to 40°F average annual minimum).
How San Diego compares
At roughly 365 frost-free days, San Diego places 21 of 40,283 ZIP codes in this dataset. Within CA, it ranks 14 of 2,555.
Learn more
the methodology covers exactly which NOAA and USDA figures feed 92123's numbers. zone vs. frost date covers why Zone 10b and San Diego's frost date answer different questions.