| 2023 Hardiness Zone: | 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. 11 - Nov. 20 |
| Average Last Frost Date: | Mar. 21 - Mar. 31 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 68b - Sequatchie Valley |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 35976 - Guntersville, AL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 32 | 40 | 47 | 56 | 64 | 68 | 67 | 61 | 49 | 40 | 33 | 49 |
| Avg Max Temp (°F) | 50 | 55 | 64 | 72 | 80 | 87 | 90 | 89 | 84 | 73 | 63 | 53 | 72 |
| Avg Precip (In.) | 5.22 | 4.96 | 6.26 | 4.84 | 4.53 | 3.95 | 4.37 | 3.38 | 4.28 | 3.1 | 4.5 | 4.83 | 54.22 |