Rancho Santa Margarita, CA 92678 Frost Dates
Frost dates for Rancho Santa Margarita, CA, ZIP 92678
The NOAA station nearest to 92678 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 Rancho Santa Margarita compares
Rancho Santa Margarita's growing season runs about 365 days, ranking 908 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 372 of 2,555.
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the methodology explains exactly which NOAA and USDA figures feed 92678's numbers, and zone vs. frost date explains why Zone 10b and Rancho Santa Margarita's frost date answer different questions.