Coosawhatchie, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.6 °C (low) to 25.1 °C (high). Annual precipitation averages 1332 Millimeters. Coosawhatchie 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 | 3 °C | 15.9 °C | 98.04 mm |
| February | 4.4 °C | 17.7 °C | 93.22 mm |
| March | 7.7 °C | 21.3 °C | 88.65 mm |
| April | 11.7 °C | 25.6 °C | 89.66 mm |
| May | 16.4 °C | 29.3 °C | 84.07 mm |
| June | 20.2 °C | 31.9 °C | 145.54 mm |
| July | 22 °C | 33.3 °C | 156.72 mm |
| August | 21.7 °C | 32.4 °C | 170.43 mm |
| September | 19.2 °C | 30 °C | 137.41 mm |
| October | 13.3 °C | 25.8 °C | 95 mm |
| November | 7.6 °C | 20.7 °C | 74.93 mm |
| December | 4.5 °C | 17.2 °C | 98.3 mm |
| Annual | 12.6 °C | 25.1 °C | 1331.97 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |