Signal Hill, CA 90846 Frost Dates
90846, near Signal Hill, CA: the frost window
The NOAA station nearest to 90846 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).
Signal Hill against the rest of the dataset
Signal Hill's growing season runs about 365 days, ranking 1,716 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 838 of 2,555.
Learn more
Two guides worth reading on 90846: the methodology, on exactly which NOAA and USDA figures feed 90846's numbers, and zone vs. frost date, on why Zone 10b and Signal Hill's frost date answer different questions.