Lake Secession, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10 °C (low) to 22.8 °C (high). Annual precipitation averages 1223 Millimeters. Lake Secession 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.3 °C | 12.2 °C | 109.47 mm |
| February | 1.1 °C | 14.3 °C | 106.68 mm |
| March | 4.4 °C | 18.5 °C | 118.62 mm |
| April | 9 °C | 23.2 °C | 88.39 mm |
| May | 14.2 °C | 27.2 °C | 84.58 mm |
| June | 18.8 °C | 30.8 °C | 113.28 mm |
| July | 20.9 °C | 32.7 °C | 100.33 mm |
| August | 20.4 °C | 31.7 °C | 103.12 mm |
| September | 17 °C | 28.8 °C | 93.22 mm |
| October | 10.1 °C | 23.3 °C | 82.8 mm |
| November | 3.8 °C | 17.9 °C | 102.11 mm |
| December | 0.9 °C | 13.4 °C | 120.4 mm |
| Annual | 10 °C | 22.8 °C | 1223 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |