Deconstruct SunHardiness Zone 9b: Temperature, States & Cities
In USDA zone 9b, the coldest night of a typical winter falls between 25 and 30 °F (−3.9 to −1.1 °C).
average annual extreme minimum
Where is zone 9b?
On the 2023 USDA map, zone 9b appears in California, Texas, Florida, Arizona, Louisiana, Nevada, Oregon.
Cities in zone 9b
- Phoenix, AZ
- Tucson, AZ
- Mesa, AZ
- Chandler, AZ
- Gilbert, AZ
- Glendale, AZ
- Surprise, AZ
- San Jose, CA
- Fresno, CA
- Sacramento, CA
- Bakersfield, CA
- Stockton, CA
- Modesto, CA
- Moreno Valley, CA
- Elk Grove, CA
- Oceanside, CA
- Salinas, CA
- Roseville, CA
- Visalia, CA
- Santa Rosa, CA
- Chico, CA
- Eureka, CA
- Jacksonville, FL
- Pensacola, FL
- Daytona Beach, FL
- New Orleans, LA
- Lake Charles, LA
- Henderson, NV
- Hilton Head Island, SC
- Houston, TX
- Laredo, TX
Gardening in zone 9b
Pick perennials, shrubs and trees labeled for zone 9b 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 9b?
In zone 9b, the average coldest winter night is 25 to 30 °F (−3.9 to −1.1 °C). That is the average of each year’s lowest temperature from 1991 to 2020.
What is the difference between zone 9b and 9a?
Both are part of zone 9. The “a” half is 5 °F colder than the “b” half. Zone 9a averages 20 to 25 °F and zone 9b averages 25 to 30 °F.
Can I grow zone 10a plants in zone 9b?
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.