Thunderbolt, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.9 °F (low) to 77.1 °F (high). Annual precipitation averages 52.3 Inches. Thunderbolt is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Jan. 1 - Jan. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.3 °F | 61.1 °F | 3.56 in. |
| February | 42.2 °F | 64.5 °F | 3.41 in. |
| March | 48.4 °F | 70.6 °F | 3.65 in. |
| April | 55.4 °F | 77.1 °F | 3.07 in. |
| May | 63.5 °F | 83.7 °F | 3.52 in. |
| June | 70.6 °F | 88.9 °F | 6.25 in. |
| July | 73.3 °F | 91.7 °F | 5.99 in. |
| August | 72.8 °F | 90.2 °F | 7.42 in. |
| September | 68.8 °F | 85.8 °F | 4.88 in. |
| October | 58.4 °F | 78.4 °F | 4.42 in. |
| November | 47.8 °F | 69.9 °F | 2.59 in. |
| December | 41.9 °F | 63.4 °F | 3.55 in. |
| Annual | 56.9 °F | 77.1 °F | 52.31 in. |
| Average First Frost Date | Jan. 1 - Jan. 10 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |