Thunderbolt, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.8 °C (low) to 25.1 °C (high). Annual precipitation averages 1328.7 Millimeters. 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 | 4.1 °C | 16.2 °C | 90.42 mm |
| February | 5.7 °C | 18.1 °C | 86.61 mm |
| March | 9.1 °C | 21.4 °C | 92.71 mm |
| April | 13 °C | 25.1 °C | 77.98 mm |
| May | 17.5 °C | 28.7 °C | 89.41 mm |
| June | 21.4 °C | 31.6 °C | 158.75 mm |
| July | 22.9 °C | 33.2 °C | 152.15 mm |
| August | 22.7 °C | 32.3 °C | 188.47 mm |
| September | 20.4 °C | 29.9 °C | 123.95 mm |
| October | 14.7 °C | 25.8 °C | 112.27 mm |
| November | 8.8 °C | 21.1 °C | 65.79 mm |
| December | 5.5 °C | 17.4 °C | 90.17 mm |
| Annual | 13.8 °C | 25.1 °C | 1328.68 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |