Sewanee, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.1 °F (low) to 66.2 °F (high). Annual precipitation averages 65.1 Inches. Sewanee is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.9 °F | 45.0 °F | 5.33 in. |
| February | 31.3 °F | 48.9 °F | 5.67 in. |
| March | 38.6 °F | 57.6 °F | 6.11 in. |
| April | 47.1 °F | 67.0 °F | 6.4 in. |
| May | 55.9 °F | 74.3 °F | 5.09 in. |
| June | 63.2 °F | 81.0 °F | 5.66 in. |
| July | 66.3 °F | 83.9 °F | 5.56 in. |
| August | 65.2 °F | 83.6 °F | 4.89 in. |
| September | 59.9 °F | 78.5 °F | 4.79 in. |
| October | 48.7 °F | 68.5 °F | 3.77 in. |
| November | 39.3 °F | 57.6 °F | 4.87 in. |
| December | 32.3 °F | 48.4 °F | 6.92 in. |
| Annual | 48.1 °F | 66.2 °F | 65.06 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |