Sweetwater, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.5 °F (low) to 69.9 °F (high). Annual precipitation averages 60.1 Inches. Sweetwater is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.5 °F | 48.0 °F | 5.41 in. |
| February | 31.1 °F | 52.4 °F | 5.12 in. |
| March | 37.6 °F | 61.4 °F | 5.74 in. |
| April | 45.8 °F | 70.6 °F | 5.26 in. |
| May | 55.4 °F | 78.8 °F | 4.6 in. |
| June | 63.6 °F | 85.0 °F | 5.11 in. |
| July | 67.4 °F | 87.9 °F | 5.85 in. |
| August | 66.2 °F | 87.6 °F | 4.08 in. |
| September | 59.7 °F | 82.9 °F | 4.67 in. |
| October | 47.0 °F | 72.0 °F | 3.53 in. |
| November | 36.0 °F | 60.4 °F | 4.77 in. |
| December | 31.6 °F | 51.3 °F | 5.93 in. |
| Annual | 47.5 °F | 69.9 °F | 60.07 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |