| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F |
| Average First Frost Date: | Jan. 1 - Jan. 10 |
| Average Last Frost Date: | Feb. 1 - Feb. 10 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 65f - Southern Pine Plains and Hills |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 36544 - Irvington, AL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 40 | 42 | 49 | 55 | 63 | 70 | 72 | 72 | 68 | 57 | 48 | 42 | 57 |
| Avg Max Temp (°F) | 60 | 64 | 70 | 77 | 83 | 89 | 91 | 90 | 87 | 79 | 70 | 63 | 77 |
| Avg Precip (In.) | 6.22 | 5.44 | 6.81 | 4.51 | 5.42 | 5.01 | 7.33 | 6.28 | 5.71 | 3.41 | 5.04 | 4.51 | 65.68 |