Highland Beach, Florida has a Tropical Rainforest climate (Köppen classification: Af). Average annual temperatures range from 20.9 °C (low) to 28.1 °C (high). Annual precipitation averages 1487.2 Millimeters. Highland Beach is located in USDA Plant Hardiness Zone 11a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.3 °C | 23.7 °C | 68.07 mm |
| February | 16.3 °C | 24.7 °C | 74.17 mm |
| March | 17.8 °C | 25.7 °C | 69.09 mm |
| April | 20.3 °C | 27.4 °C | 83.82 mm |
| May | 22.3 °C | 29.1 °C | 115.57 mm |
| June | 24.2 °C | 30.7 °C | 207.26 mm |
| July | 24.9 °C | 31.6 °C | 146.56 mm |
| August | 25.2 °C | 31.8 °C | 194.82 mm |
| September | 24.7 °C | 30.9 °C | 214.63 mm |
| October | 23 °C | 29.3 °C | 144.27 mm |
| November | 19.6 °C | 26.8 °C | 94.23 mm |
| December | 17.3 °C | 24.9 °C | 74.68 mm |
| Annual | 20.9 °C | 28.1 °C | 1487.17 mm |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 11a : 4.4°C to 7.2°C |
| Plant Hardiness Zone - 2012 | Zone 10b : 1.7°C to 4.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Af - Tropical Rainforest |