| 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: | 67g - Southern Shale Valleys |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 30755 - Tunnel Hill, GA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 29 | 31 | 39 | 46 | 55 | 63 | 68 | 67 | 60 | 47 | 39 | 32 | 48 |
| Avg Max Temp (°F) | 49 | 54 | 62 | 72 | 79 | 86 | 89 | 88 | 82 | 73 | 62 | 52 | 71 |
| Avg Precip (In.) | 5.62 | 5.01 | 6.15 | 3.93 | 4.13 | 4.01 | 4.17 | 3.37 | 4.54 | 3.4 | 4.69 | 4.92 | 53.95 |