Gramling, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.7 °C (low) to 21.8 °C (high). Annual precipitation averages 1381 Millimeters. Gramling 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.6 °C | 10.9 °C | 116.08 mm |
| February | 0.8 °C | 13.2 °C | 101.85 mm |
| March | 4.3 °C | 17.3 °C | 120.9 mm |
| April | 9.1 °C | 22.3 °C | 116.08 mm |
| May | 13.9 °C | 26.2 °C | 109.47 mm |
| June | 18 °C | 29.8 °C | 120.65 mm |
| July | 20.3 °C | 31.8 °C | 123.19 mm |
| August | 19.7 °C | 30.8 °C | 127.25 mm |
| September | 16.3 °C | 27.8 °C | 113.79 mm |
| October | 9.8 °C | 22.4 °C | 100.84 mm |
| November | 4 °C | 16.7 °C | 105.66 mm |
| December | 1.1 °C | 12.2 °C | 125.22 mm |
| Annual | 9.7 °C | 21.8 °C | 1380.98 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| 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 |