Signal Hill, CA 90807 Frost Dates
When can you plant in Signal Hill, CA?
The NOAA station nearest to 90807 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 Signal Hill compares
About 365 days separate Signal Hill's last and first frost, putting it 1,714 of 40,283 ZIP codes nationally. Within CA, it ranks 836 of 2,555.
Learn more
zone vs. frost date covers why Zone 10b and Signal Hill's frost date answer different questions. local microclimates covers what one yard in Signal Hill can differ from the 90807 normal.