Dellrose, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.2 °F (low) to 70.4 °F (high). Annual precipitation averages 59.1 Inches. Dellrose 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 | 29.3 °F | 48.6 °F | 5.31 in. |
| February | 31.8 °F | 53.0 °F | 5.36 in. |
| March | 38.8 °F | 61.7 °F | 5.65 in. |
| April | 47.0 °F | 71.0 °F | 5.22 in. |
| May | 56.6 °F | 78.9 °F | 4.77 in. |
| June | 64.2 °F | 85.5 °F | 4.93 in. |
| July | 67.9 °F | 88.6 °F | 4.85 in. |
| August | 66.4 °F | 88.1 °F | 4.43 in. |
| September | 59.6 °F | 83.1 °F | 4.26 in. |
| October | 47.8 °F | 73.1 °F | 3.77 in. |
| November | 37.1 °F | 61.0 °F | 4.21 in. |
| December | 32.0 °F | 51.6 °F | 6.32 in. |
| Annual | 48.2 °F | 70.4 °F | 59.08 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |