Fort Pierce, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 18.9 °C (low) to 27.8 °C (high). Annual precipitation averages 1466.9 Millimeters. Fort Pierce is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.2 °C | 22.8 °C | 74.93 mm |
| February | 13.5 °C | 23.9 °C | 69.09 mm |
| March | 15.3 °C | 25.1 °C | 81.79 mm |
| April | 18.1 °C | 27.3 °C | 85.09 mm |
| May | 20.8 °C | 29.3 °C | 114.81 mm |
| June | 22.9 °C | 31.1 °C | 176.53 mm |
| July | 23.6 °C | 32.1 °C | 154.18 mm |
| August | 23.9 °C | 32.1 °C | 202.18 mm |
| September | 23.5 °C | 31 °C | 201.42 mm |
| October | 21.3 °C | 29.1 °C | 153.67 mm |
| November | 17.1 °C | 26 °C | 84.58 mm |
| December | 14.3 °C | 24.1 °C | 68.58 mm |
| Annual | 18.9 °C | 27.8 °C | 1466.85 mm |
| Average First Frost Date | No Frost |
| 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 10a : -1.1°C to 1.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |