Port LaBelle, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 17 °C (low) to 29.2 °C (high). Annual precipitation averages 1356.9 Millimeters. Port LaBelle is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.1 °C | 23.8 °C | 51.05 mm |
| February | 11.4 °C | 25.3 °C | 50.8 mm |
| March | 12.9 °C | 27.1 °C | 61.21 mm |
| April | 15.6 °C | 29.6 °C | 64.52 mm |
| May | 18.6 °C | 31.7 °C | 114.3 mm |
| June | 21.6 °C | 32.8 °C | 249.17 mm |
| July | 22.4 °C | 33.2 °C | 200.91 mm |
| August | 22.7 °C | 33.3 °C | 229.36 mm |
| September | 22.3 °C | 32.3 °C | 175.26 mm |
| October | 19.3 °C | 30.2 °C | 71.12 mm |
| November | 14.8 °C | 26.9 °C | 43.94 mm |
| December | 12.2 °C | 24.7 °C | 45.21 mm |
| Annual | 17 °C | 29.2 °C | 1356.85 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 |