Hilltop, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.8 °C (low) to 23 °C (high). Annual precipitation averages 1299.7 Millimeters. Hilltop 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 | 0.8 °C | 12.8 °C | 116.08 mm |
| February | 2.3 °C | 14.9 °C | 121.41 mm |
| March | 5.8 °C | 19.1 °C | 131.83 mm |
| April | 9.8 °C | 23.1 °C | 106.68 mm |
| May | 14.8 °C | 27.2 °C | 86.11 mm |
| June | 18.9 °C | 30.3 °C | 107.44 mm |
| July | 20.7 °C | 31.8 °C | 129.03 mm |
| August | 20.4 °C | 31.3 °C | 106.17 mm |
| September | 17.2 °C | 28.7 °C | 92.71 mm |
| October | 11 °C | 23.7 °C | 77.98 mm |
| November | 5.2 °C | 18.4 °C | 98.55 mm |
| December | 2.3 °C | 14.1 °C | 125.73 mm |
| Annual | 10.8 °C | 23 °C | 1299.72 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |