Salem, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.9 °F (low) to 71.5 °F (high). Annual precipitation averages 64.5 Inches. Salem is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 29.4 °F | 52.2 °F | 6.06 in. |
| February | 31.9 °F | 56.0 °F | 5.11 in. |
| March | 38.0 °F | 63.6 °F | 5.65 in. |
| April | 46.0 °F | 72.6 °F | 4.92 in. |
| May | 55.0 °F | 79.7 °F | 4.72 in. |
| June | 63.4 °F | 85.6 °F | 5.35 in. |
| July | 66.9 °F | 88.9 °F | 5.22 in. |
| August | 66.3 °F | 87.3 °F | 6.46 in. |
| September | 60.3 °F | 82.1 °F | 5.27 in. |
| October | 47.6 °F | 72.7 °F | 4.57 in. |
| November | 37.6 °F | 63.0 °F | 4.84 in. |
| December | 32.8 °F | 54.8 °F | 6.3 in. |
| Annual | 47.9 °F | 71.5 °F | 64.47 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |