Darlington, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.9 °C (low) to 23.6 °C (high). Annual precipitation averages 1212.9 Millimeters. Darlington is located in USDA Plant Hardiness Zone 8b. 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 | 0.7 °C | 13.1 °C | 91.44 mm |
| February | 1.8 °C | 15.1 °C | 86.87 mm |
| March | 5.2 °C | 19.2 °C | 95.25 mm |
| April | 10 °C | 24.3 °C | 81.03 mm |
| May | 15.1 °C | 28.1 °C | 94.74 mm |
| June | 19.7 °C | 31.4 °C | 122.17 mm |
| July | 21.6 °C | 33 °C | 131.06 mm |
| August | 20.8 °C | 32 °C | 137.41 mm |
| September | 17.6 °C | 29.2 °C | 124.46 mm |
| October | 11 °C | 24.3 °C | 82.3 mm |
| November | 5.1 °C | 18.8 °C | 74.68 mm |
| December | 2.2 °C | 14.5 °C | 91.44 mm |
| Annual | 10.9 °C | 23.6 °C | 1212.85 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 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |