Warthen, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.3 °C (low) to 24.1 °C (high). Annual precipitation averages 1202.4 Millimeters. Warthen is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.4 °C | 14 °C | 110.49 mm |
| February | 2.6 °C | 16 °C | 107.19 mm |
| March | 6.3 °C | 20.3 °C | 114.3 mm |
| April | 10.1 °C | 24.4 °C | 85.09 mm |
| May | 15.3 °C | 28.3 °C | 78.99 mm |
| June | 19.6 °C | 31.4 °C | 113.79 mm |
| July | 21.5 °C | 33.3 °C | 111.51 mm |
| August | 20.9 °C | 32.3 °C | 121.92 mm |
| September | 17.9 °C | 29.6 °C | 99.31 mm |
| October | 11.7 °C | 24.7 °C | 71.12 mm |
| November | 5.5 °C | 19.4 °C | 77.22 mm |
| December | 2.8 °C | 15.2 °C | 111.51 mm |
| Annual | 11.3 °C | 24.1 °C | 1202.44 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |