Hilham, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.8 °F (low) to 68.2 °F (high). Annual precipitation averages 56 Inches. Hilham is located in USDA Plant Hardiness Zone 7a. 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 | 27.0 °F | 45.6 °F | 4.65 in. |
| February | 29.7 °F | 50.2 °F | 4.94 in. |
| March | 36.4 °F | 58.9 °F | 5.23 in. |
| April | 45.0 °F | 69.4 °F | 5.08 in. |
| May | 55.3 °F | 76.9 °F | 4.92 in. |
| June | 63.0 °F | 83.7 °F | 5.2 in. |
| July | 66.7 °F | 86.8 °F | 5.22 in. |
| August | 65.2 °F | 86.5 °F | 3.98 in. |
| September | 58.8 °F | 81.1 °F | 4.05 in. |
| October | 46.7 °F | 70.9 °F | 3.13 in. |
| November | 36.8 °F | 58.6 °F | 3.85 in. |
| December | 30.6 °F | 49.3 °F | 5.75 in. |
| Annual | 46.8 °F | 68.2 °F | 56 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |