Piedmont, CA 94602 Frost Dates

94602, near Piedmont, CA: the frost window

The NOAA station nearest to 94602 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

At roughly 365 frost-free days, Piedmont places 1,719 of 40,283 ZIP codes in this dataset. Within CA, it ranks 840 of 2,555.

Learn more

Two guides worth reading on 94602: 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 94602 normal.