Northlake, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.8 °C (low) to 22.7 °C (high). Annual precipitation averages 1280.2 Millimeters. Northlake 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 | 0.4 °C | 11.9 °C | 115.32 mm |
| February | 1.9 °C | 13.9 °C | 108.46 mm |
| March | 5.4 °C | 18.2 °C | 117.86 mm |
| April | 9.8 °C | 23.1 °C | 102.11 mm |
| May | 14.8 °C | 27.1 °C | 98.55 mm |
| June | 19.3 °C | 30.8 °C | 108.46 mm |
| July | 21.2 °C | 32.8 °C | 107.19 mm |
| August | 20.8 °C | 31.7 °C | 117.86 mm |
| September | 17.6 °C | 28.8 °C | 89.66 mm |
| October | 10.9 °C | 23.4 °C | 85.85 mm |
| November | 4.9 °C | 17.6 °C | 103.38 mm |
| December | 2 °C | 13.3 °C | 125.48 mm |
| Annual | 10.8 °C | 22.7 °C | 1280.18 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 8b : -9.4°C to -6.7°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 |