Chattanooga Valley, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.1 °C (low) to 21.8 °C (high). Annual precipitation averages 1414 Millimeters. Chattanooga Valley is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.3 °C | 9.9 °C | 133.1 mm |
| February | 0.3 °C | 12.3 °C | 128.27 mm |
| March | 3.8 °C | 17.1 °C | 137.16 mm |
| April | 8.1 °C | 22.5 °C | 127.25 mm |
| May | 13.3 °C | 26.4 °C | 106.17 mm |
| June | 17.8 °C | 30.1 °C | 100.33 mm |
| July | 19.9 °C | 31.7 °C | 113.28 mm |
| August | 19.4 °C | 31.6 °C | 92.2 mm |
| September | 15.9 °C | 28.8 °C | 119.89 mm |
| October | 9.1 °C | 23.1 °C | 91.19 mm |
| November | 2.9 °C | 16.3 °C | 120.65 mm |
| December | 0.3 °C | 11.4 °C | 144.53 mm |
| Annual | 9.1 °C | 21.8 °C | 1414.02 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |