Piedmont, CA 94611 Frost Dates
94611, near Piedmont, CA: the frost window
The NOAA station nearest to 94611 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 10a (30 to 35°F average annual minimum).
Piedmont against the rest of the dataset
About 365 days separate Piedmont's last and first frost, putting it 1,722 of 40,283 ZIP codes nationally. Within CA, it ranks 843 of 2,555.
Learn more
Two guides worth reading on 94611: zone vs. frost date, on why Zone 10a and Piedmont's frost date answer different questions, and local microclimates, on what one yard in Piedmont can differ from the 94611 normal.