Lookout Mountain, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.7 °C (low) to 19.3 °C (high). Annual precipitation averages 1581.9 Millimeters. Lookout Mountain 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 | -2 °C | 7.4 °C | 151.64 mm |
| February | -0.3 °C | 9.8 °C | 151.64 mm |
| March | 3.6 °C | 14.7 °C | 151.89 mm |
| April | 8.3 °C | 20.3 °C | 136.65 mm |
| May | 13 °C | 24.1 °C | 124.21 mm |
| June | 17.1 °C | 27.7 °C | 113.79 mm |
| July | 18.8 °C | 29.4 °C | 125.73 mm |
| August | 18.3 °C | 29.1 °C | 98.3 mm |
| September | 15.2 °C | 26.2 °C | 124.46 mm |
| October | 9 °C | 20.4 °C | 98.81 mm |
| November | 3.7 °C | 13.9 °C | 136.14 mm |
| December | 0.2 °C | 8.9 °C | 168.66 mm |
| Annual | 8.7 °C | 19.3 °C | 1581.92 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |