New Union, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.9 °F (low) to 68.6 °F (high). Annual precipitation averages 58 Inches. New Union 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 | 27.9 °F | 47.4 °F | 4.94 in. |
| February | 30.3 °F | 51.6 °F | 5.19 in. |
| March | 37.3 °F | 60.2 °F | 5.49 in. |
| April | 45.6 °F | 69.3 °F | 5.53 in. |
| May | 54.9 °F | 76.5 °F | 4.6 in. |
| June | 63.0 °F | 83.3 °F | 5.3 in. |
| July | 66.8 °F | 86.2 °F | 4.89 in. |
| August | 65.2 °F | 85.9 °F | 4.0 in. |
| September | 58.5 °F | 80.9 °F | 4.11 in. |
| October | 46.4 °F | 70.9 °F | 3.37 in. |
| November | 36.0 °F | 59.7 °F | 4.18 in. |
| December | 31.2 °F | 50.8 °F | 6.44 in. |
| Annual | 46.9 °F | 68.6 °F | 58.04 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |