Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Zone 13a

In USDA zone 13a the coldest night of an average winter reaches 60 to 65 °F (15.6 to 18.3 °C). 101 ZIP codes (0.2% of all) are in this zone.

Zone13a60 to 65 °F

Coldest night15.6 to 18.3 °C

ZIP codes101

Typical last frost—

Typical first frost—

States with zone 13a

Puerto Rico100 ZIPs Hawaii1 ZIPs

Cities mostly in zone 13a

San Juan, PR36 ZIPs Ponce, PR8 ZIPs Bayamon, PR6 ZIPs Guaynabo, PR6 ZIPs Aguadilla, PR3 ZIPs Arecibo, PR3 ZIPs Mayaguez, PR3 ZIPs Toa Baja, PR3 ZIPs Vega Baja, PR2 ZIPs Guayama, PR2 ZIPs Humacao, PR2 ZIPs Toa Alta, PR2 ZIPs

← Zone 12b (colder)Zone 13b (warmer) →

Questions

What is the temperature range of zone 13a?

Zone 13a covers places where the coldest night of an average winter (the annual extreme minimum averaged over 1991–2020) is 60 to 65 °F, or 15.6 to 18.3 °C.

Which states have zone 13a?

Zone 13a occurs in 2 states; the most ZIP codes are in Puerto Rico, Hawaii.

What can I grow in zone 13a?

Perennials, shrubs and trees labeled hardy to zone 13a or a lower (colder) number should survive a typical winter. Annual vegetables depend on frost dates rather than zone.

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.