Fern Park, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 62.7 °F (low) to 82.5 °F (high). Annual precipitation averages 55.9 Inches. Fern Park is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 48.8 °F | 70.5 °F | 2.94 in. |
| February | 51.5 °F | 73.5 °F | 2.46 in. |
| March | 55.4 °F | 77.8 °F | 3.47 in. |
| April | 60.8 °F | 82.8 °F | 3.03 in. |
| May | 66.8 °F | 87.6 °F | 3.88 in. |
| June | 72.0 °F | 90.4 °F | 8.26 in. |
| July | 73.8 °F | 91.6 °F | 7.67 in. |
| August | 74.2 °F | 91.5 °F | 8.24 in. |
| September | 72.6 °F | 89.2 °F | 7.23 in. |
| October | 66.4 °F | 84.4 °F | 3.93 in. |
| November | 57.9 °F | 77.7 °F | 2.22 in. |
| December | 52.3 °F | 72.8 °F | 2.6 in. |
| Annual | 62.7 °F | 82.5 °F | 55.93 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |