Whittier, CA 90603 Frost Dates
When can you plant in Whittier, CA?
The NOAA station nearest to 90603 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 Whittier compares
About 365 days separate Whittier's last and first frost, putting it 651 of 40,283 ZIP codes nationally. Within CA, it ranks 282 of 2,555.
Learn more
the methodology covers exactly which NOAA and USDA figures feed 90603's numbers. zone vs. frost date covers why Zone 10b and Whittier's frost date answer different questions.