Clarkesville, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.9 °C (low) to 21.3 °C (high). Annual precipitation averages 1564.1 Millimeters. Clarkesville 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 | -0.9 °C | 10.7 °C | 142.24 mm |
| February | 0.6 °C | 12.8 °C | 130.3 mm |
| March | 3.6 °C | 16.9 °C | 142.24 mm |
| April | 7.8 °C | 21.7 °C | 119.13 mm |
| May | 12.7 °C | 25.4 °C | 115.06 mm |
| June | 17.1 °C | 28.9 °C | 132.84 mm |
| July | 19.1 °C | 30.7 °C | 125.73 mm |
| August | 18.7 °C | 30 °C | 153.16 mm |
| September | 15.4 °C | 27.2 °C | 116.33 mm |
| October | 8.9 °C | 22.2 °C | 113.03 mm |
| November | 3.2 °C | 16.7 °C | 125.48 mm |
| December | 0.5 °C | 12.2 °C | 148.59 mm |
| Annual | 8.9 °C | 21.3 °C | 1564.13 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |