Deconstruct SunHardiness Zone 10a: Temperature, States & Cities
In USDA zone 10a, the coldest night of a typical winter falls between 30 and 35 °F (−1.1 to 1.7 °C).
average annual extreme minimum
Where is zone 10a?
On the 2023 USDA map, zone 10a appears in California, Florida, Texas, Arizona, Louisiana.
Cities in zone 10a
- Scottsdale, AZ
- Peoria, AZ
- Tempe, AZ
- Yuma, AZ
- Oakland, CA
- Anaheim, CA
- Riverside, CA
- Irvine, CA
- Fremont, CA
- San Bernardino, CA
- Fontana, CA
- Santa Clarita, CA
- Glendale, CA
- Ontario, CA
- Rancho Cucamonga, CA
- Corona, CA
- Hayward, CA
- Sunnyvale, CA
- Escondido, CA
- Fullerton, CA
- Berkeley, CA
- Palm Springs, CA
- San Luis Obispo, CA
- Santa Cruz, CA
- Tampa, FL
- Orlando, FL
- Port St. Lucie, FL
- Clearwater, FL
- Palm Bay, FL
- Lakeland, FL
- Sarasota, FL
- Corpus Christi, TX
- Brownsville, TX
- McAllen, TX
- Galveston, TX
Gardening in zone 10a
Pick perennials, shrubs and trees labeled for zone 10a 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 10a?
In zone 10a, the average coldest winter night is 30 to 35 °F (−1.1 to 1.7 °C). That is the average of each year’s lowest temperature from 1991 to 2020.
What is the difference between zone 10a and 10b?
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 10b plants in zone 10a?
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.