Fullerton, CA 92805 Frost Dates
92805, near Fullerton, CA: the frost window
The NOAA station nearest to 92805 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).
Fullerton against the rest of the dataset
Fullerton's growing season runs about 365 days, ranking 407 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 150 of 2,555.
Learn more
Two guides worth reading on 92805: the methodology, on exactly which NOAA and USDA figures feed 92805's numbers, and zone vs. frost date, on why Zone 10b and Fullerton's frost date answer different questions.