Overview
This data set provides the USDA Plant Hardiness Zone for each US Postal Service ZIP Code. It covers the entire United States and its territories. Updated monthly.
Last updated March 19, 2025. The record count is 38,932.
Dataset
This data is provided in 3 formats: CSV, JSON, and XML.
All formats provide 3 data points:
- ZipCode: 5-digit ZIP Code
- Zone: USDA Plant Hardiness Zone name. Possible values:
- 1a
- 1b
- 2a
- 2b
- 3a
- 3b
- 4a
- 4b
- 5a
- 5b
- 6a
- 6b
- 7a
- 7b
- 8a
- 8b
- 9a
- 9b
- 10a
- 10b
- 11a
- 11b
- 12a
- 12b
- 13a
- 13b
- MinTempRange: the average annual extreme minimum temperature. Possible values:
- < -55
- -55 to -50
- -50 to -45
- -45 to -40
- -35 to -40
- -30 to -35
- -25 to -30
- -20 to -25
- -15 to -20
- -10 to -15
- -5 to -10
- 0 to -5
- 0 to 5
- 5 to 10
- 10 to 15
- 15 to 20
- 20 to 25
- 25 to 30
- 30 to 35
- 35 to 40
- 40 to 45
- 45 to 50
- 50 to 55
- 55 to 60
- 60 to 65
- > 65
Excluded ZIP Codes
Excludes APO, DPO, FPO, and unique (single-entity) ZIP codes because they are non-geographic.