Cayce, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.7 °C (low) to 24.3 °C (high). Annual precipitation averages 1211.6 Millimeters. Cayce 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.5 °C | 13.9 °C | 99.31 mm |
| February | 2.8 °C | 15.9 °C | 91.69 mm |
| March | 6.5 °C | 20.1 °C | 106.68 mm |
| April | 11 °C | 24.9 °C | 77.72 mm |
| May | 15.9 °C | 28.8 °C | 86.61 mm |
| June | 20.3 °C | 32.1 °C | 128.52 mm |
| July | 22.2 °C | 33.8 °C | 119.89 mm |
| August | 21.7 °C | 32.8 °C | 123.7 mm |
| September | 18.6 °C | 30.2 °C | 105.16 mm |
| October | 11.9 °C | 24.9 °C | 91.44 mm |
| November | 5.7 °C | 19.4 °C | 80.52 mm |
| December | 2.7 °C | 15.2 °C | 100.33 mm |
| Annual | 11.7 °C | 24.3 °C | 1211.57 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |