Sweetwater, Florida has a Tropical Monsoon climate (Köppen classification: Am). Average annual temperatures range from 20.3 °C (low) to 29 °C (high). Annual precipitation averages 1661.2 Millimeters. Sweetwater is located in USDA Plant Hardiness Zone 11a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.6 °C | 24.6 °C | 53.85 mm |
| February | 15.7 °C | 25.7 °C | 54.61 mm |
| March | 17.2 °C | 26.9 °C | 65.02 mm |
| April | 19.5 °C | 28.8 °C | 79.5 mm |
| May | 21.8 °C | 30.4 °C | 154.18 mm |
| June | 23.8 °C | 31.8 °C | 251.71 mm |
| July | 24.4 °C | 32.5 °C | 200.66 mm |
| August | 24.6 °C | 32.6 °C | 229.87 mm |
| September | 24.3 °C | 31.8 °C | 239.78 mm |
| October | 22.5 °C | 30.1 °C | 194.06 mm |
| November | 18.9 °C | 27.3 °C | 74.93 mm |
| December | 16.6 °C | 25.6 °C | 62.99 mm |
| Annual | 20.3 °C | 29 °C | 1661.16 mm |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 11a : 4.4°C to 7.2°C |
| Plant Hardiness Zone - 2012 | Zone 10b : 1.7°C to 4.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Am - Tropical Monsoon |