Brownsville, Florida has a Tropical Monsoon climate (Köppen classification: Am). Average annual temperatures range from 70.1 °F (low) to 83.7 °F (high). Annual precipitation averages 65.5 Inches. Brownsville is located in USDA Plant Hardiness Zone 11a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 60.3 °F | 75.9 °F | 2.27 in. |
| February | 62.4 °F | 77.7 °F | 2.42 in. |
| March | 65.0 °F | 79.7 °F | 2.66 in. |
| April | 69.1 °F | 82.9 °F | 3.29 in. |
| May | 73.0 °F | 85.9 °F | 5.77 in. |
| June | 75.8 °F | 88.4 °F | 9.47 in. |
| July | 77.3 °F | 90.0 °F | 7.85 in. |
| August | 77.3 °F | 90.3 °F | 8.72 in. |
| September | 76.4 °F | 88.8 °F | 9.46 in. |
| October | 73.6 °F | 85.8 °F | 7.74 in. |
| November | 67.8 °F | 80.9 °F | 3.23 in. |
| December | 63.6 °F | 77.8 °F | 2.63 in. |
| Annual | 70.1 °F | 83.7 °F | 65.51 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 | Abnormally Dry |
| Köppen Climate Classification | Am - Tropical Monsoon |