Chewalla, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.4 °F (low) to 71.7 °F (high). Annual precipitation averages 57.8 Inches. Chewalla is located in USDA Plant Hardiness Zone 8a. 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 | 30.1 °F | 49.8 °F | 4.81 in. |
| February | 33.0 °F | 54.6 °F | 5.12 in. |
| March | 39.9 °F | 63.2 °F | 5.57 in. |
| April | 48.4 °F | 72.6 °F | 5.61 in. |
| May | 58.2 °F | 80.2 °F | 5.41 in. |
| June | 66.1 °F | 87.2 °F | 4.53 in. |
| July | 69.5 °F | 90.1 °F | 4.59 in. |
| August | 67.8 °F | 89.8 °F | 3.85 in. |
| September | 60.6 °F | 84.6 °F | 4.22 in. |
| October | 48.3 °F | 74.1 °F | 3.98 in. |
| November | 38.0 °F | 62.1 °F | 4.33 in. |
| December | 33.0 °F | 52.5 °F | 5.75 in. |
| Annual | 49.4 °F | 71.7 °F | 57.77 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |