Deconstruct SunHardiness Zone 10b: Temperature, States & Cities
In USDA zone 10b, the coldest night of a typical winter falls between 35 and 40 °F (1.7 to 4.4 °C).
average annual extreme minimum
Where is zone 10b?
On the 2023 USDA map, zone 10b appears in California, Florida.
Cities in zone 10b
- Los Angeles, CA
- San Diego, CA
- San Francisco, CA
- Long Beach, CA
- Santa Ana, CA
- Chula Vista, CA
- Huntington Beach, CA
- Oxnard, CA
- Garden Grove, CA
- Pasadena, CA
- Torrance, CA
- Santa Barbara, CA
- St. Petersburg, FL
- Cape Coral, FL
- Coral Springs, FL
- West Palm Beach, FL
- Naples, FL
- Fort Myers, FL
Gardening in zone 10b
Pick perennials, shrubs and trees labeled for zone 10b or a lower number. Then match the light: every plant tag also lists full sun, part sun or shade, and that depends on the exact spot, not the zone.
Check your zone
Zone checked. Now measure the sun.
Deconstruct Sun shows how many hours of direct sun one exact spot gets, today and in every season. Free on iPhone.
Questions
What is the temperature range for zone 10b?
In zone 10b, the average coldest winter night is 35 to 40 °F (1.7 to 4.4 °C). That is the average of each year’s lowest temperature from 1991 to 2020.
What is the difference between zone 10b and 10a?
Both are part of zone 10. The “a” half is 5 °F colder than the “b” half. Zone 10a averages 30 to 35 °F and zone 10b averages 35 to 40 °F.
Can I grow zone 11a plants in zone 10b?
A plant rated for a warmer zone may survive a mild winter, but one hard freeze can kill it. Choose plants rated for your zone or colder for permanent plantings, and treat warmer-zone plants as annuals or grow them in pots you can move.
This is not the official USDA Plant Hardiness Zone Map. Zones are derived from the official 2023 dataset, resampled to about 2 km.