Shellman, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.1 °F (low) to 76.5 °F (high). Annual precipitation averages 52.4 Inches. Shellman is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 36.7 °F | 59.0 °F | 4.88 in. |
| February | 39.6 °F | 62.7 °F | 4.67 in. |
| March | 45.2 °F | 70.0 °F | 5.0 in. |
| April | 52.1 °F | 76.7 °F | 4.2 in. |
| May | 61.3 °F | 84.4 °F | 3.01 in. |
| June | 68.4 °F | 89.2 °F | 4.94 in. |
| July | 70.9 °F | 91.0 °F | 5.66 in. |
| August | 70.4 °F | 90.3 °F | 4.66 in. |
| September | 65.7 °F | 86.3 °F | 3.86 in. |
| October | 54.8 °F | 78.4 °F | 2.72 in. |
| November | 44.3 °F | 68.6 °F | 3.53 in. |
| December | 39.2 °F | 61.2 °F | 5.25 in. |
| Annual | 54.1 °F | 76.5 °F | 52.38 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |