Signal Hill, CA 90806 Frost Dates
90806, near Signal Hill, CA: the frost window
The NOAA station nearest to 90806 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
At roughly 365 frost-free days, Signal Hill places 1,713 of 40,283 ZIP codes in this dataset. Within CA, it ranks 835 of 2,555.
Learn more
Two guides worth reading on 90806: local microclimates, on what one yard in Signal Hill can differ from the 90806 normal, and the methodology, on exactly which NOAA and USDA figures feed 90806's numbers.