Belleair Beach, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 66.8 °F (low) to 79 °F (high). Annual precipitation averages 56.1 Inches. Belleair Beach is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 53.1 °F | 68.0 °F | 3.01 in. |
| February | 56.0 °F | 69.6 °F | 2.65 in. |
| March | 60.3 °F | 73.5 °F | 3.19 in. |
| April | 65.9 °F | 77.8 °F | 2.84 in. |
| May | 71.7 °F | 82.7 °F | 2.91 in. |
| June | 76.2 °F | 86.3 °F | 7.7 in. |
| July | 77.3 °F | 87.4 °F | 9.39 in. |
| August | 77.4 °F | 88.1 °F | 9.47 in. |
| September | 75.5 °F | 86.8 °F | 7.26 in. |
| October | 70.3 °F | 82.2 °F | 2.71 in. |
| November | 62.0 °F | 75.2 °F | 2.07 in. |
| December | 56.4 °F | 70.5 °F | 2.87 in. |
| Annual | 66.8 °F | 79 °F | 56.07 in. |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10b : 35°F to 30°F |
| Plant Hardiness Zone - 2012 | Zone 10a : 30°F to 25°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |