| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Mar. 11 - Mar. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 35a - Tertiary Uplands |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 71486 - Zwolle, LA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 35 | 38 | 45 | 52 | 61 | 68 | 71 | 69 | 64 | 51 | 43 | 36 | 53 |
| Avg Max Temp (°F) | 57 | 62 | 70 | 77 | 83 | 89 | 93 | 93 | 88 | 79 | 68 | 60 | 77 |
| Avg Precip (In.) | 5.36 | 4.4 | 4.93 | 4.22 | 5.52 | 4.63 | 3.7 | 3.28 | 3.57 | 4.2 | 4.49 | 5.49 | 53.81 |