Rancho Santa Margarita, CA 92688 Frost Dates
92688, near Rancho Santa Margarita, CA: the frost window
The NOAA station nearest to 92688 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).
Rancho Santa Margarita against the rest of the dataset
At roughly 365 frost-free days, Rancho Santa Margarita places 910 of 40,283 ZIP codes in this dataset. Within CA, it ranks 374 of 2,555.
Learn more
Two guides worth reading on 92688: zone vs. frost date, on why Zone 10b and Rancho Santa Margarita's frost date answer different questions, and local microclimates, on what one yard in Rancho Santa Margarita can differ from the 92688 normal.