| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| 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: | 67f - Southern Limestone/Dolomite Valleys and Low Rolling Hills |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 35080 - Helena, AL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 32 | 34 | 42 | 48 | 57 | 64 | 68 | 67 | 62 | 49 | 41 | 34 | 50 |
| Avg Max Temp (°F) | 55 | 60 | 67 | 76 | 82 | 89 | 91 | 91 | 86 | 77 | 66 | 57 | 75 |
| Avg Precip (In.) | 6.13 | 5.04 | 6.57 | 4.91 | 4.72 | 4.33 | 5.14 | 3.6 | 4.19 | 3.24 | 4.76 | 4.98 | 57.59 |