Arizona Planting Zones
Arizona runs from zone 5b to zone 10a on the 2023 USDA map. Zone 9b is the most common, covering 39% of the state's ZIP codes. Phoenix is 9b and Tucson is 9b.
Zones across Arizona
| Zone | Average coldest night | Share of Arizona ZIP codes |
|---|---|---|
| 5b | −15 to −10°F | under 1% |
| 6a | −10 to −5°F | 1% |
| 6b | −5 to 0°F | 5% |
| 7a | 0 to 5°F | 8% |
| 7b | 5 to 10°F | 3% |
| 8a | 10 to 15°F | 6% |
| 8b | 15 to 20°F | 11% |
| 9a | 20 to 25°F | 13% |
| 9b | 25 to 30°F | 39% |
| 10a | 30 to 35°F | 14% |
Planting zone for every city and town in Arizona
Each Arizona town uses the ZIP code at its center. Big towns can cross into the next half-zone, so look up your own ZIP if you're near a line.
| City | Zone | Average coldest night |
|---|---|---|
| Apache Junction | 9b | 25 to 30°F |
| Avondale | 9b | 25 to 30°F |
| Benson | 8b | 15 to 20°F |
| Bisbee | 8b | 15 to 20°F |
| Buckeye | 9b | 25 to 30°F |
| Bullhead City | 10a | 30 to 35°F |
| Camp Verde | 8b | 15 to 20°F |
| Carefree | 9b | 25 to 30°F |
| Casa Grande | 9a | 20 to 25°F |
| Cave Creek | 9b | 25 to 30°F |
| Chandler | 9b | 25 to 30°F |
| Chino Valley | 8a | 10 to 15°F |
| Clarkdale | 8b | 15 to 20°F |
| Clifton | 8b | 15 to 20°F |
| Colorado City | 7b | 5 to 10°F |
| Coolidge | 9a | 20 to 25°F |
| Cottonwood | 8b | 15 to 20°F |
| Dewey-Humboldt | 8a | 10 to 15°F |
| Douglas | 8a | 10 to 15°F |
| Duncan | 8a | 10 to 15°F |
| Eagar | 6a | −10 to −5°F |
| El Mirage | 9b | 25 to 30°F |
| Eloy | 9a | 20 to 25°F |
| Florence | 9b | 25 to 30°F |
| Fountain Hills | 9b | 25 to 30°F |
| Fredonia | 7a | 0 to 5°F |
| Gila Bend | 9b | 25 to 30°F |
| Gilbert | 9b | 25 to 30°F |
| Glendale | 9b | 25 to 30°F |
| Globe | 8a | 10 to 15°F |
| Goodyear | 9b | 25 to 30°F |
| Guadalupe | 9b | 25 to 30°F |
| Hayden | 9a | 20 to 25°F |
| Holbrook | 7a | 0 to 5°F |
| Huachuca City | 8b | 15 to 20°F |
| Jerome | 8b | 15 to 20°F |
| Kearny | 9a | 20 to 25°F |
| Kingman | 8b | 15 to 20°F |
| Lake Havasu City | 10a | 30 to 35°F |
| Litchfield Park | 9b | 25 to 30°F |
| Mammoth | 9a | 20 to 25°F |
| Marana | 9b | 25 to 30°F |
| Maricopa | 9a | 20 to 25°F |
| Mesa | 9b | 25 to 30°F |
| Miami | 8a | 10 to 15°F |
| Nogales | 8b | 15 to 20°F |
| Oro Valley | 9a | 20 to 25°F |
| Page | 7b | 5 to 10°F |
| Paradise Valley | 10a | 30 to 35°F |
| Parker | 9b | 25 to 30°F |
| Patagonia | 8a | 10 to 15°F |
| Payson | 8b | 15 to 20°F |
| Peoria | 9b | 25 to 30°F |
| Phoenix | 9b | 25 to 30°F |
| Pima | 8b | 15 to 20°F |
| Pinetop-Lakeside | 6b | −5 to 0°F |
| Prescott | 7b | 5 to 10°F |
| Prescott Valley | 7b | 5 to 10°F |
| Quartzsite | 9a | 20 to 25°F |
| Queen Creek | 9b | 25 to 30°F |
| Safford | 8b | 15 to 20°F |
| Sahuarita | 9a | 20 to 25°F |
| San Luis | 10a | 30 to 35°F |
| Scottsdale | 10a | 30 to 35°F |
| Sedona | 8b | 15 to 20°F |
| Show Low | 7a | 0 to 5°F |
| Sierra Vista | 8b | 15 to 20°F |
| Snowflake | 7a | 0 to 5°F |
| Somerton | 10a | 30 to 35°F |
| South Tucson | 9b | 25 to 30°F |
| Springerville | 6b | −5 to 0°F |
| St. Johns | 6b | −5 to 0°F |
| Star Valley | 8b | 15 to 20°F |
| Superior | 9b | 25 to 30°F |
| Surprise | 9b | 25 to 30°F |
| Taylor | 7a | 0 to 5°F |
| Tempe | 10a | 30 to 35°F |
| Thatcher | 8b | 15 to 20°F |
| Tolleson | 9b | 25 to 30°F |
| Tombstone | 8b | 15 to 20°F |
| Tucson | 9b | 25 to 30°F |
| Tusayan | 7a | 0 to 5°F |
| Wellton | 9b | 25 to 30°F |
| Wickenburg | 9a | 20 to 25°F |
| Willcox | 8b | 15 to 20°F |
| Williams | 7a | 0 to 5°F |
| Winkelman | 9a | 20 to 25°F |
| Winslow | 7a | 0 to 5°F |
| Youngtown | 9b | 25 to 30°F |
| Yuma | 10a | 30 to 35°F |
Source: USDA Plant Hardiness Zone Map, 2023, Agricultural Research Service, U.S. Department of Agriculture; ZIP code table from the PRISM Group, Oregon State University (accessed Oct 2026). This list is our own summary, not the official USDA map. See how we calculate.
Frequently asked questions
What planting zone is Arizona?
Arizona spans zones 5b to 10a on the 2023 USDA map, and zone 9b is the most common. Look up your ZIP code for your exact zone.
What zone is Phoenix, AZ?
Phoenix is zone 9b, where the coldest night of an average winter falls from 25 to 30°F. Plants rated hardy to zone 9 or colder should survive a typical winter there.
More for Arizona: Arizona climate zones (insulation) · Last frost dates in Arizona · Frost line depth by state