Santee, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12 °C (low) to 24.3 °C (high). Annual precipitation averages 1249.9 Millimeters. Santee 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 | 14.4 °C | 95.25 mm |
| February | 3.3 °C | 16.3 °C | 92.2 mm |
| March | 6.8 °C | 20.4 °C | 95.76 mm |
| April | 11.3 °C | 24.9 °C | 84.58 mm |
| May | 16 °C | 28.6 °C | 93.47 mm |
| June | 20.3 °C | 31.6 °C | 135.89 mm |
| July | 22.1 °C | 33.1 °C | 138.43 mm |
| August | 21.5 °C | 32.1 °C | 136.14 mm |
| September | 18.7 °C | 29.6 °C | 120.4 mm |
| October | 12.5 °C | 25 °C | 94.49 mm |
| November | 6.3 °C | 19.7 °C | 69.09 mm |
| December | 3.4 °C | 15.9 °C | 94.23 mm |
| Annual | 12 °C | 24.3 °C | 1249.93 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 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |