Zone 13a

Hardiness Zone 13a

USDA hardiness zone 13a has an average coldest winter night of 60 to 65 °F (16 to 18 °C). On the 2023 map it covers ZIP codes in 2 states, mostly Puerto Rico and Hawaii. Cities in zone 13a include Aguadilla, PR; Arecibo, PR; Toa Baja, PR.

Average coldest night

60 to 65 °F

16 to 18 °C

States with zone 13a

ZIP codes in zone 13a

102

Check your own zone

States in zone 13a

State	ZIP codes	Share of state
Puerto Rico	100	57%
Hawaii	2	2%

Cities in zone 13a

Larger places where every ZIP code is zone 13a.

Zones: 2023 USDA Plant Hardiness Zone Map ZIP code data, USDA Agricultural Research Service and the PRISM Climate Group, Oregon State University (official map). Place names: GeoNames (CC BY 4.0). Each ZIP code gets one zone, but a ZIP code can cross a zone line, and hills, valleys and towns can be warmer or colder than the zone shown.

About the Hardiness Zone Map

The Hardiness Zone Map finds your USDA plant hardiness zone, also called your planting or growing zone, from your ZIP code. Zones are based on the average coldest winter night of the year: each zone is 10 °F wide and split into a and b halves of 5 °F, from zone 1a in Alaska to 13b in Puerto Rico. Plant labels and seed packets give the coldest zone a plant can survive, so knowing your zone tells you which perennials, shrubs and trees can stay outside all winter. Zones come from the official 2023 USDA map ZIP code data for all 50 states, Washington DC and Puerto Rico.

How to use it

1 Enter your 5-digit ZIP code and press Find my zone.
2 Read your zone and the average coldest winter temperature it stands for.
3 Open your state to see its zones and the zone of every city.
4 Choose plants rated for your zone number or a colder (lower) one.

Frequently asked questions

What is the lowest temperature in zone 13a?

In zone 13a the coldest night of the year averages 60 to 65 °F (16 to 18 °C). That is an average over 1991–2020, so a hard winter can go lower.

Which states have zone 13a?

Zone 13a is found in Puerto Rico and Hawaii.

What is the difference between zone 13a and 13b?

Zone 13b is 5 °F warmer than 13a. Zone 13a has winter lows of 60 to 65 °F, and zone 13b 65 to 70 °F. Plant labels often give only the number, which covers both halves.

What plants grow in zone 13a?

Plants labelled hardy to zone 13 or colder (a lower number) should survive a zone 13a winter. Plants rated only for warmer zones may be damaged by frost unless grown in pots and brought in, or given shelter.

Related tools

Visited Places Map

Colour the countries, states and provinces you’ve been to, share your map and send friends places to visit

Where Food Grows

See which countries grow the most rice, mango, coffee, cocoa and 69 more crops on an animated world map

Unit Converter

Convert units of measurement

Date Calculator

Days between dates, add days, and working days with holidays

Taste Map

The most famous dish and street food of 193 countries: tick the ones you’ve tried and colour your world map

Where Animals Live

See every country where tigers, lions, pandas, penguins, hilsa and 200 more wild animals and fish live