Chapel Hill, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.3 °C (low) to 21.2 °C (high). Annual precipitation averages 1392.7 Millimeters. Chapel Hill 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 | -2.3 °C | 8.7 °C | 114.3 mm |
| February | -0.8 °C | 11.3 °C | 126.24 mm |
| March | 2.7 °C | 16.1 °C | 137.67 mm |
| April | 7.3 °C | 21.6 °C | 128.78 mm |
| May | 12.8 °C | 26 °C | 122.94 mm |
| June | 17.3 °C | 29.9 °C | 119.63 mm |
| July | 19.6 °C | 31.7 °C | 118.87 mm |
| August | 18.7 °C | 31.6 °C | 89.15 mm |
| September | 14.6 °C | 28.6 °C | 111 mm |
| October | 7.8 °C | 22.7 °C | 86.11 mm |
| November | 2.2 °C | 15.8 °C | 98.81 mm |
| December | -0.9 °C | 10.5 °C | 139.19 mm |
| Annual | 8.3 °C | 21.2 °C | 1392.69 mm |
| 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 : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |