Placentia, CA 92870 Frost Dates
92870, near Placentia, CA: the frost window
The NOAA station nearest to 92870 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).
Placentia against the rest of the dataset
About 365 days separate Placentia's last and first frost, putting it 867 of 40,283 ZIP codes nationally. Within CA, it ranks 348 of 2,555.
Learn more
Two guides worth reading on 92870: the methodology, on exactly which NOAA and USDA figures feed 92870's numbers, and zone vs. frost date, on why Zone 10b and Placentia's frost date answer different questions.