Hortense, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.8 °C (low) to 25.9 °C (high). Annual precipitation averages 1319.8 Millimeters. Hortense is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.5 °C | 17.2 °C | 108.2 mm |
| February | 4.9 °C | 19.1 °C | 95.25 mm |
| March | 7.8 °C | 22.6 °C | 107.95 mm |
| April | 11.5 °C | 26.2 °C | 80.52 mm |
| May | 15.9 °C | 29.8 °C | 89.41 mm |
| June | 20.3 °C | 32.2 °C | 173.74 mm |
| July | 21.8 °C | 33.5 °C | 147.07 mm |
| August | 21.8 °C | 32.8 °C | 179.07 mm |
| September | 19.6 °C | 30.6 °C | 110.74 mm |
| October | 13.8 °C | 26.5 °C | 97.54 mm |
| November | 7.8 °C | 22.1 °C | 54.1 mm |
| December | 5 °C | 18.4 °C | 76.2 mm |
| Annual | 12.8 °C | 25.9 °C | 1319.79 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |