Myrtle Beach, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.5 °C (low) to 22.3 °C (high). Annual precipitation averages 1338.1 Millimeters. Myrtle Beach is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.2 °C | 13.3 °C | 84.07 mm |
| February | 4.4 °C | 14.7 °C | 90.17 mm |
| March | 7.7 °C | 17.9 °C | 92.71 mm |
| April | 12.7 °C | 21.8 °C | 77.72 mm |
| May | 17.3 °C | 25.7 °C | 85.85 mm |
| June | 21.6 °C | 28.8 °C | 132.33 mm |
| July | 23.6 °C | 30.4 °C | 148.59 mm |
| August | 22.9 °C | 29.8 °C | 152.65 mm |
| September | 20.3 °C | 27.9 °C | 203.96 mm |
| October | 14.4 °C | 23.7 °C | 105.66 mm |
| November | 8.3 °C | 18.8 °C | 73.66 mm |
| December | 5 °C | 14.9 °C | 90.68 mm |
| Annual | 13.5 °C | 22.3 °C | 1338.05 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 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 |