Helen, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.6 °F (low) to 69 °F (high). Annual precipitation averages 69.8 Inches. Helen is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 29.1 °F | 50.1 °F | 6.38 in. |
| February | 31.9 °F | 54.1 °F | 5.69 in. |
| March | 37.2 °F | 61.4 °F | 6.58 in. |
| April | 44.4 °F | 70.4 °F | 5.53 in. |
| May | 53.2 °F | 76.7 °F | 4.88 in. |
| June | 61.1 °F | 82.5 °F | 5.7 in. |
| July | 64.6 °F | 85.3 °F | 5.78 in. |
| August | 64.0 °F | 84.3 °F | 6.74 in. |
| September | 58.4 °F | 79.3 °F | 5.16 in. |
| October | 46.6 °F | 70.2 °F | 5.08 in. |
| November | 36.3 °F | 60.6 °F | 5.68 in. |
| December | 31.8 °F | 52.9 °F | 6.62 in. |
| Annual | 46.6 °F | 69 °F | 69.82 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |