Varnell, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.5 °C (low) to 21.7 °C (high). Annual precipitation averages 1437.1 Millimeters. Varnell is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.9 °C | 10 °C | 137.92 mm |
| February | 0.5 °C | 12.3 °C | 127.51 mm |
| March | 4.1 °C | 17.1 °C | 146.3 mm |
| April | 8.6 °C | 22.3 °C | 119.13 mm |
| May | 13.7 °C | 26.4 °C | 111.51 mm |
| June | 18.2 °C | 29.9 °C | 111 mm |
| July | 20.2 °C | 31.7 °C | 115.57 mm |
| August | 19.7 °C | 31.4 °C | 106.43 mm |
| September | 16.2 °C | 28.6 °C | 112.78 mm |
| October | 9.3 °C | 22.8 °C | 83.82 mm |
| November | 3.3 °C | 16.5 °C | 115.06 mm |
| December | 0.8 °C | 11.5 °C | 150.11 mm |
| Annual | 9.5 °C | 21.7 °C | 1437.14 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 |