Dalzell, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.3 °C (low) to 23.9 °C (high). Annual precipitation averages 1205.5 Millimeters. Dalzell 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 | 1.1 °C | 13.6 °C | 95 mm |
| February | 2.3 °C | 15.6 °C | 89.15 mm |
| March | 5.8 °C | 19.7 °C | 93.22 mm |
| April | 10.4 °C | 24.5 °C | 80.77 mm |
| May | 15.4 °C | 28.2 °C | 92.96 mm |
| June | 19.8 °C | 31.5 °C | 136.4 mm |
| July | 21.7 °C | 33.1 °C | 130.81 mm |
| August | 21.1 °C | 32.2 °C | 125.22 mm |
| September | 18.1 °C | 29.5 °C | 103.89 mm |
| October | 11.7 °C | 24.6 °C | 92.71 mm |
| November | 5.4 °C | 19 °C | 72.14 mm |
| December | 2.5 °C | 15 °C | 93.22 mm |
| Annual | 11.3 °C | 23.9 °C | 1205.49 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| 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 |