Lake Forest, CA 92610 Frost Dates
92610, near Lake Forest, CA: the frost window
The NOAA station nearest to 92610 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).
Lake Forest against the rest of the dataset
At roughly 365 frost-free days, Lake Forest places 603 of 40,283 ZIP codes in this dataset. Within CA, it ranks 273 of 2,555.
Learn more
Two guides worth reading on 92610: zone vs. frost date, on why Zone 10b and Lake Forest's frost date answer different questions, and local microclimates, on what one yard in Lake Forest can differ from the 92610 normal.