Salem, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.2 °C (low) to 21.1 °C (high). Annual precipitation averages 1318.8 Millimeters. Salem is located in USDA Plant Hardiness Zone 7b. 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 | -2.3 °C | 9.9 °C | 109.73 mm |
| February | -0.9 °C | 12.2 °C | 92.96 mm |
| March | 2.7 °C | 16.3 °C | 111.25 mm |
| April | 7.4 °C | 21.6 °C | 110.49 mm |
| May | 12.4 °C | 25.7 °C | 110.49 mm |
| June | 16.9 °C | 29.3 °C | 121.16 mm |
| July | 19.1 °C | 31.2 °C | 114.81 mm |
| August | 18.4 °C | 30.2 °C | 119.63 mm |
| September | 14.9 °C | 27.1 °C | 119.13 mm |
| October | 8.2 °C | 21.9 °C | 95.5 mm |
| November | 2.2 °C | 16.3 °C | 94.74 mm |
| December | -0.8 °C | 11.4 °C | 118.87 mm |
| Annual | 8.2 °C | 21.1 °C | 1318.76 mm |
| 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 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |