Snellville, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50 °F (low) to 71.4 °F (high). Annual precipitation averages 52.8 Inches. Snellville is located in USDA Plant Hardiness Zone 8a. 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 | 31.4 °F | 51.9 °F | 4.86 in. |
| February | 34.2 °F | 55.8 °F | 4.81 in. |
| March | 40.4 °F | 64.0 °F | 5.08 in. |
| April | 48.1 °F | 72.1 °F | 4.18 in. |
| May | 57.3 °F | 79.4 °F | 3.8 in. |
| June | 65.4 °F | 85.6 °F | 4.65 in. |
| July | 68.8 °F | 88.4 °F | 4.95 in. |
| August | 68.0 °F | 87.7 °F | 4.29 in. |
| September | 61.8 °F | 82.3 °F | 3.69 in. |
| October | 50.5 °F | 73.0 °F | 3.52 in. |
| November | 39.6 °F | 62.7 °F | 4.21 in. |
| December | 34.6 °F | 54.4 °F | 4.73 in. |
| Annual | 50 °F | 71.4 °F | 52.77 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |