Lely, Florida has a Tropical Savanna (Wet and Dry Climate) climate (Köppen classification: Aw). Average annual temperatures range from 18.8 °C (low) to 29 °C (high). Annual precipitation averages 1420.4 Millimeters. Lely is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.2 °C | 23.9 °C | 52.07 mm |
| February | 13.6 °C | 25.2 °C | 46.99 mm |
| March | 15.3 °C | 26.7 °C | 42.67 mm |
| April | 17.9 °C | 28.8 °C | 62.48 mm |
| May | 20.5 °C | 30.8 °C | 89.92 mm |
| June | 23 °C | 32.2 °C | 243.08 mm |
| July | 23.8 °C | 32.7 °C | 229.36 mm |
| August | 23.9 °C | 32.5 °C | 236.98 mm |
| September | 23.6 °C | 32.2 °C | 243.33 mm |
| October | 21.2 °C | 30.4 °C | 88.9 mm |
| November | 16.8 °C | 27.3 °C | 41.91 mm |
| December | 14.3 °C | 25.2 °C | 42.67 mm |
| Annual | 18.8 °C | 29 °C | 1420.36 mm |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10b : 1.7°C to 4.4°C |
| Plant Hardiness Zone - 2012 | Zone 10a : -1.1°C to 1.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Aw - Tropical Savanna (Wet and Dry Climate) |