Palmetto Bay, Florida has a Tropical Monsoon climate (Köppen classification: Am). Average annual temperatures range from 69.7 °F (low) to 83.7 °F (high). Annual precipitation averages 61 Inches. Palmetto Bay is located in USDA Plant Hardiness Zone 11a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 60.1 °F | 75.9 °F | 2.01 in. |
| February | 61.9 °F | 77.7 °F | 2.2 in. |
| March | 64.5 °F | 79.8 °F | 2.33 in. |
| April | 68.5 °F | 83.2 °F | 3.1 in. |
| May | 72.5 °F | 86.1 °F | 5.55 in. |
| June | 75.4 °F | 88.6 °F | 9.25 in. |
| July | 76.9 °F | 89.9 °F | 6.77 in. |
| August | 76.9 °F | 90.1 °F | 8.02 in. |
| September | 76.1 °F | 88.6 °F | 9.23 in. |
| October | 73.2 °F | 85.7 °F | 7.07 in. |
| November | 67.5 °F | 80.9 °F | 3.01 in. |
| December | 63.4 °F | 77.9 °F | 2.43 in. |
| Annual | 69.7 °F | 83.7 °F | 60.97 in. |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 11a : 40°F to 35°F |
| Plant Hardiness Zone - 2012 | Zone 10b : 35°F to 30°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Am - Tropical Monsoon |