Collegedale, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.2 °F (low) to 71 °F (high). Annual precipitation averages 59.7 Inches. Collegedale is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 30.4 °F | 49.8 °F | 5.94 in. |
| February | 32.9 °F | 54.1 °F | 5.48 in. |
| March | 39.5 °F | 62.5 °F | 5.57 in. |
| April | 47.6 °F | 72.0 °F | 4.7 in. |
| May | 57.0 °F | 79.4 °F | 4.31 in. |
| June | 65.1 °F | 85.9 °F | 4.76 in. |
| July | 68.7 °F | 89.0 °F | 5.84 in. |
| August | 67.7 °F | 88.5 °F | 4.0 in. |
| September | 61.3 °F | 83.4 °F | 4.88 in. |
| October | 49.0 °F | 73.0 °F | 3.28 in. |
| November | 38.0 °F | 61.6 °F | 4.91 in. |
| December | 33.3 °F | 52.7 °F | 6.05 in. |
| Annual | 49.2 °F | 71 °F | 59.72 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |