Piedmont, CA 94609 Frost Dates
When can you plant in Piedmont, CA?
The NOAA station nearest to 94609 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).
How Piedmont compares
About 365 days separate Piedmont's last and first frost, putting it 1,720 of 40,283 ZIP codes nationally. Within CA, it ranks 841 of 2,555.
Learn more
the methodology covers exactly which NOAA and USDA figures feed 94609's numbers. zone vs. frost date covers why Zone 10a and Piedmont's frost date answer different questions.