Fullerton, CA 92831 Frost Dates
When can you plant in Fullerton, CA?
The NOAA station nearest to 92831 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 Fullerton compares
About 365 days separate Fullerton's last and first frost, putting it 408 of 40,283 ZIP codes nationally. Within CA, it ranks 151 of 2,555.
Learn more
the methodology covers exactly which NOAA and USDA figures feed 92831's numbers. zone vs. frost date covers why Zone 10b and Fullerton's frost date answer different questions.