Fern Park, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 17.1 °C (low) to 28.1 °C (high). Annual precipitation averages 1420.6 Millimeters. Fern Park is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.3 °C | 21.4 °C | 74.68 mm |
| February | 10.8 °C | 23.1 °C | 62.48 mm |
| March | 13 °C | 25.4 °C | 88.14 mm |
| April | 16 °C | 28.2 °C | 76.96 mm |
| May | 19.3 °C | 30.9 °C | 98.55 mm |
| June | 22.2 °C | 32.4 °C | 209.8 mm |
| July | 23.2 °C | 33.1 °C | 194.82 mm |
| August | 23.4 °C | 33.1 °C | 209.3 mm |
| September | 22.6 °C | 31.8 °C | 183.64 mm |
| October | 19.1 °C | 29.1 °C | 99.82 mm |
| November | 14.4 °C | 25.4 °C | 56.39 mm |
| December | 11.3 °C | 22.7 °C | 66.04 mm |
| Annual | 17.1 °C | 28.1 °C | 1420.62 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°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 |