Interlachen, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.9 °C (low) to 27.1 °C (high). Annual precipitation averages 1370.4 Millimeters. Interlachen is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.4 °C | 19.7 °C | 86.11 mm |
| February | 7.9 °C | 21.4 °C | 73.66 mm |
| March | 10.3 °C | 24.4 °C | 90.68 mm |
| April | 13.7 °C | 27.4 °C | 70.87 mm |
| May | 17.4 °C | 30.7 °C | 95.76 mm |
| June | 21.2 °C | 32.4 °C | 202.69 mm |
| July | 22.4 °C | 33 °C | 180.09 mm |
| August | 22.4 °C | 32.8 °C | 187.2 mm |
| September | 21.2 °C | 31.1 °C | 169.93 mm |
| October | 16.6 °C | 27.8 °C | 88.39 mm |
| November | 11.3 °C | 23.8 °C | 55.12 mm |
| December | 8.3 °C | 20.8 °C | 69.85 mm |
| Annual | 14.9 °C | 27.1 °C | 1370.35 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |