Ridgetop, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.5 °C (low) to 19.9 °C (high). Annual precipitation averages 1361.2 Millimeters. Ridgetop is located in USDA Plant Hardiness Zone 7a. 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 | -3.2 °C | 6.9 °C | 105.16 mm |
| February | -1.3 °C | 9.6 °C | 117.35 mm |
| March | 2.9 °C | 14.6 °C | 124.97 mm |
| April | 8.2 °C | 20.4 °C | 130.05 mm |
| May | 13.6 °C | 25 °C | 140.72 mm |
| June | 17.8 °C | 29 °C | 110.74 mm |
| July | 19.6 °C | 30.6 °C | 117.86 mm |
| August | 18.7 °C | 31.1 °C | 96.01 mm |
| September | 15.1 °C | 27.4 °C | 103.12 mm |
| October | 8.4 °C | 21.3 °C | 94.49 mm |
| November | 2.9 °C | 14.4 °C | 95.76 mm |
| December | -0.8 °C | 8.9 °C | 124.97 mm |
| Annual | 8.5 °C | 19.9 °C | 1361.2 mm |
| 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 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |