Lake Helen, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 60 °F (low) to 82 °F (high). Annual precipitation averages 55.5 Inches. Lake Helen is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 45.4 °F | 69.9 °F | 3.03 in. |
| February | 48.0 °F | 72.6 °F | 2.4 in. |
| March | 51.8 °F | 77.3 °F | 3.25 in. |
| April | 57.6 °F | 82.4 °F | 2.8 in. |
| May | 64.0 °F | 87.1 °F | 3.93 in. |
| June | 70.5 °F | 90.2 °F | 7.83 in. |
| July | 72.3 °F | 91.7 °F | 7.92 in. |
| August | 72.7 °F | 91.2 °F | 8.06 in. |
| September | 70.7 °F | 88.5 °F | 7.41 in. |
| October | 63.7 °F | 83.5 °F | 4.04 in. |
| November | 54.6 °F | 76.9 °F | 2.25 in. |
| December | 49.1 °F | 72.1 °F | 2.53 in. |
| Annual | 60 °F | 82 °F | 55.45 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |