National City, CA 91910 Frost Dates
When can you plant in National City, CA?
The NOAA station nearest to 91910 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 National City compares
National City's growing season runs about 365 days, ranking 786 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 334 of 2,555.
Learn more
zone vs. frost date covers why Zone 10b and National City's frost date answer different questions. local microclimates covers what one yard in National City can differ from the 91910 normal.