Deconstruct SunLouisiana Hardiness Zones
Louisiana covers USDA plant hardiness zones 8b to 10a on the 2023 map, so its coldest areas average 15 to 20 °F on the coldest winter night. Find your zone by ZIP code, or pick a city below for its zone, sunrise and daylight by month.
Louisiana hardiness zone map
This is not the official USDA Plant Hardiness Zone Map. Zones are derived from the official 2023 dataset, resampled to about 2 km. Dots mark cities with their own page.
Source: USDA Plant Hardiness Zone Map, 2023. Agricultural Research Service, U.S. Department of Agriculture, planthardiness.ars.usda.gov. Underlying data © PRISM Group, Oregon State University, prism.oregonstate.edu, accessed 2026-08-30.
Zones and daylight by city
| City | Zone | Coldest night | Longest day | Shortest day |
|---|---|---|---|---|
| New Orleans | 9b | 25 to 30 °F | 14h 05m | 10h 13m |
| Baton Rouge | 9a | 20 to 25 °F | 14h 07m | 10h 11m |
| Shreveport | 8b | 15 to 20 °F | 14h 17m | 10h 01m |
| Lafayette | 9a | 20 to 25 °F | 14h 06m | 10h 12m |
| Lake Charles | 9b | 25 to 30 °F | 14h 06m | 10h 12m |
| Monroe | 8b | 15 to 20 °F | 14h 17m | 10h 01m |
Gardening in Louisiana?
Your zone says what survives winter. Deconstruct Sun measures how many hours of direct sun your exact spot gets, so you can pick plants that thrive. Free on iPhone.
Questions
What hardiness zones are in Louisiana?
Louisiana spans USDA zones 8b to 10a on the 2023 map. Among its larger cities, Shreveport is coldest (zone 8b) and New Orleans is warmest (zone 9b).
How do I find my exact zone in Louisiana?
Enter your ZIP code in the hardiness zone lookup on this site. It reads the 2023 USDA data for that ZIP and warns you if you are near a zone boundary.
How much sun do gardens in Louisiana get?
In New Orleans, an open spot gets up to 14.1 hours of daylight in June but only 10.2 in December. Trees and buildings cut that down, especially in winter. The Deconstruct Sun app measures the real direct-sun hours for one exact spot.