Collinwood, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.3 °F (low) to 69.3 °F (high). Annual precipitation averages 61.5 Inches. Collinwood 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 | 26.9 °F | 47.8 °F | 5.45 in. |
| February | 29.9 °F | 52.5 °F | 5.68 in. |
| March | 36.5 °F | 61.0 °F | 5.58 in. |
| April | 45.0 °F | 70.7 °F | 5.51 in. |
| May | 54.2 °F | 77.2 °F | 5.23 in. |
| June | 62.3 °F | 83.8 °F | 5.16 in. |
| July | 66.0 °F | 87.1 °F | 5.34 in. |
| August | 64.9 °F | 86.8 °F | 4.49 in. |
| September | 58.1 °F | 81.9 °F | 4.61 in. |
| October | 45.6 °F | 71.6 °F | 3.85 in. |
| November | 36.4 °F | 60.0 °F | 4.35 in. |
| December | 30.3 °F | 50.6 °F | 6.28 in. |
| Annual | 46.3 °F | 69.3 °F | 61.53 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 |