Belleair Beach, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 19.4 °C (low) to 26.1 °C (high). Annual precipitation averages 1424.2 Millimeters. Belleair Beach is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.7 °C | 20 °C | 76.45 mm |
| February | 13.3 °C | 20.9 °C | 67.31 mm |
| March | 15.7 °C | 23.1 °C | 81.03 mm |
| April | 18.8 °C | 25.4 °C | 72.14 mm |
| May | 22.1 °C | 28.2 °C | 73.91 mm |
| June | 24.6 °C | 30.2 °C | 195.58 mm |
| July | 25.2 °C | 30.8 °C | 238.51 mm |
| August | 25.2 °C | 31.2 °C | 240.54 mm |
| September | 24.2 °C | 30.4 °C | 184.4 mm |
| October | 21.3 °C | 27.9 °C | 68.83 mm |
| November | 16.7 °C | 24 °C | 52.58 mm |
| December | 13.6 °C | 21.4 °C | 72.9 mm |
| Annual | 19.4 °C | 26.1 °C | 1424.18 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |