Santa Ana, CA 92707 Frost Dates
Santa Ana, CA: when does the frost end?
The NOAA station nearest to 92707 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).
Santa Ana against the rest of the dataset
Santa Ana's growing season runs about 365 days, ranking 303 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 96 of 2,555.
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Before leaning on 92707's figures: zone vs. frost date explains why Zone 10b and Santa Ana's frost date answer different questions, while local microclimates explains what one yard in Santa Ana can differ from the 92707 normal.