Royal Palm Beach, Florida has a Tropical Monsoon climate (Köppen classification: Am). Average annual temperatures range from 18.7 °C (low) to 28.7 °C (high). Annual precipitation averages 1529.8 Millimeters. Royal Palm Beach is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.8 °C | 23.7 °C | 70.36 mm |
| February | 13.9 °C | 25.1 °C | 59.18 mm |
| March | 15.4 °C | 26.4 °C | 89.66 mm |
| April | 17.9 °C | 28.4 °C | 79.5 mm |
| May | 20.2 °C | 30.3 °C | 120.9 mm |
| June | 22.3 °C | 31.7 °C | 214.38 mm |
| July | 23.1 °C | 32.5 °C | 170.69 mm |
| August | 23.4 °C | 32.7 °C | 212.09 mm |
| September | 22.9 °C | 31.7 °C | 218.44 mm |
| October | 20.9 °C | 29.7 °C | 148.08 mm |
| November | 17.3 °C | 26.8 °C | 86.61 mm |
| December | 14.8 °C | 25 °C | 59.94 mm |
| Annual | 18.7 °C | 28.7 °C | 1529.83 mm |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10b : 1.7°C to 4.4°C |
| Plant Hardiness Zone - 2012 | Zone 10a : -1.1°C to 1.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Am - Tropical Monsoon |