Suwanee, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.9 °F (low) to 71.4 °F (high). Annual precipitation averages 54.6 Inches. Suwanee 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 | 31.3 °F | 51.5 °F | 5.01 in. |
| February | 34.1 °F | 55.5 °F | 4.88 in. |
| March | 40.2 °F | 63.7 °F | 5.11 in. |
| April | 47.9 °F | 72.1 °F | 4.28 in. |
| May | 57.2 °F | 79.4 °F | 4.04 in. |
| June | 65.2 °F | 85.7 °F | 4.63 in. |
| July | 68.7 °F | 88.5 °F | 5.08 in. |
| August | 67.9 °F | 87.9 °F | 4.59 in. |
| September | 61.7 °F | 82.5 °F | 4.27 in. |
| October | 50.3 °F | 73.1 °F | 3.73 in. |
| November | 39.5 °F | 62.6 °F | 4.18 in. |
| December | 34.5 °F | 54.3 °F | 4.79 in. |
| Annual | 49.9 °F | 71.4 °F | 54.59 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 |