Lake Mary, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 16.5 °C (low) to 28 °C (high). Annual precipitation averages 1410.7 Millimeters. Lake Mary is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.7 °C | 21.3 °C | 74.68 mm |
| February | 10.1 °C | 22.9 °C | 62.99 mm |
| March | 12.3 °C | 25.4 °C | 87.38 mm |
| April | 15.3 °C | 28.2 °C | 76.71 mm |
| May | 18.7 °C | 30.9 °C | 95.25 mm |
| June | 21.9 °C | 32.6 °C | 203.96 mm |
| July | 22.9 °C | 33.3 °C | 191.52 mm |
| August | 23.2 °C | 33.2 °C | 207.26 mm |
| September | 22.2 °C | 31.8 °C | 184.66 mm |
| October | 18.6 °C | 29 °C | 104.39 mm |
| November | 13.7 °C | 25.2 °C | 57.66 mm |
| December | 10.6 °C | 22.6 °C | 64.26 mm |
| Annual | 16.5 °C | 28 °C | 1410.72 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |