| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 7b: 5°F to 10°F |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F |
| Average First Frost Date: | Nov. 1 - Nov. 10 |
| Average Last Frost Date: | Apr. 1 - Apr. 10 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 71j - Little Mountain |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 35640 - Hartselle, AL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 29 | 32 | 40 | 47 | 56 | 64 | 68 | 66 | 60 | 47 | 39 | 32 | 48 |
| Avg Max Temp (°F) | 50 | 55 | 64 | 72 | 79 | 87 | 90 | 90 | 84 | 74 | 63 | 53 | 72 |
| Avg Precip (In.) | 5.45 | 4.69 | 6.48 | 4.92 | 4.72 | 4.42 | 4.46 | 3.66 | 4.32 | 3.42 | 4.82 | 5.18 | 56.54 |