Sweetwater, Florida has a Tropical Monsoon climate (Köppen classification: Am). Average annual temperatures range from 68.6 °F (low) to 84.2 °F (high). Annual precipitation averages 65.4 Inches. Sweetwater is located in USDA Plant Hardiness Zone 11a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 58.2 °F | 76.2 °F | 2.12 in. |
| February | 60.3 °F | 78.2 °F | 2.15 in. |
| March | 62.9 °F | 80.4 °F | 2.56 in. |
| April | 67.1 °F | 83.9 °F | 3.13 in. |
| May | 71.2 °F | 86.8 °F | 6.07 in. |
| June | 74.8 °F | 89.2 °F | 9.91 in. |
| July | 76.0 °F | 90.5 °F | 7.9 in. |
| August | 76.3 °F | 90.7 °F | 9.05 in. |
| September | 75.7 °F | 89.2 °F | 9.44 in. |
| October | 72.5 °F | 86.2 °F | 7.64 in. |
| November | 66.1 °F | 81.2 °F | 2.95 in. |
| December | 61.8 °F | 78.1 °F | 2.48 in. |
| Annual | 68.6 °F | 84.2 °F | 65.4 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 |