Denmark, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.7 °C (low) to 24.5 °C (high). Annual precipitation averages 1257.3 Millimeters. Denmark 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.9 °C | 14.6 °C | 100.08 mm |
| February | 3.2 °C | 16.7 °C | 94.49 mm |
| March | 6.5 °C | 20.7 °C | 102.87 mm |
| April | 10.8 °C | 24.9 °C | 79.25 mm |
| May | 15.6 °C | 28.8 °C | 91.69 mm |
| June | 19.8 °C | 32.2 °C | 141.99 mm |
| July | 21.7 °C | 33.5 °C | 136.4 mm |
| August | 21.2 °C | 32.3 °C | 147.32 mm |
| September | 18.2 °C | 29.8 °C | 115.06 mm |
| October | 11.9 °C | 25 °C | 81.79 mm |
| November | 6.1 °C | 19.8 °C | 71.63 mm |
| December | 3 °C | 15.7 °C | 94.74 mm |
| Annual | 11.7 °C | 24.5 °C | 1257.31 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |