Salem, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8 °C (low) to 19.8 °C (high). Annual precipitation averages 1128.5 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 | -2.6 °C | 7.8 °C | 83.57 mm |
| February | -1.5 °C | 9.9 °C | 70.61 mm |
| March | 2.1 °C | 14.6 °C | 93.47 mm |
| April | 7.1 °C | 20.5 °C | 95.25 mm |
| May | 12.2 °C | 24.7 °C | 114.55 mm |
| June | 16.8 °C | 28.6 °C | 116.59 mm |
| July | 19.1 °C | 30.6 °C | 107.19 mm |
| August | 18.3 °C | 29.6 °C | 88.9 mm |
| September | 14.7 °C | 26.3 °C | 112.52 mm |
| October | 8.1 °C | 20.7 °C | 83.06 mm |
| November | 2.3 °C | 14.8 °C | 77.72 mm |
| December | -0.9 °C | 9.6 °C | 85.09 mm |
| Annual | 8 °C | 19.8 °C | 1128.52 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |