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

Zone 13b

In USDA zone 13b the coldest night of an average winter reaches 65 to 70 °F (18.3 to 21.1 °C). 26 ZIP codes (0.1% of all) are in this zone.

Zone13b65 to 70 °F
Coldest night18.3 to 21.1 °C
ZIP codes26
Typical last frost—
Typical first frost—

States with zone 13b

Puerto Rico26 ZIPs

Cities mostly in zone 13b

Carolina, PR9 ZIPsCatano, PR2 ZIPsTrujillo Alto, PR2 ZIPs

← Zone 13a (colder)

Questions

What is the temperature range of zone 13b?

Zone 13b covers places where the coldest night of an average winter (the annual extreme minimum averaged over 1991–2020) is 65 to 70 °F, or 18.3 to 21.1 °C.

Which states have zone 13b?

Zone 13b occurs in 1 state; the most ZIP codes are in Puerto Rico.

What can I grow in zone 13b?

Perennials, shrubs and trees labeled hardy to zone 13b 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.