Oak Ridge, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.3 °F (low) to 69.8 °F (high). Annual precipitation averages 56.9 Inches. Oak Ridge is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.8 °F | 47.7 °F | 5.06 in. |
| February | 31.7 °F | 52.2 °F | 5.46 in. |
| March | 38.2 °F | 61.3 °F | 5.22 in. |
| April | 46.7 °F | 70.9 °F | 5.21 in. |
| May | 56.0 °F | 78.7 °F | 4.17 in. |
| June | 64.3 °F | 85.2 °F | 4.87 in. |
| July | 68.3 °F | 87.9 °F | 5.89 in. |
| August | 67.1 °F | 87.5 °F | 3.42 in. |
| September | 60.8 °F | 82.9 °F | 4.08 in. |
| October | 48.5 °F | 72.2 °F | 3.27 in. |
| November | 37.4 °F | 60.3 °F | 4.28 in. |
| December | 32.3 °F | 50.9 °F | 5.98 in. |
| Annual | 48.3 °F | 69.8 °F | 56.91 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 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 |