Damascus, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 46 °F (low) to 63.1 °F (high). Annual precipitation averages 47.2 Inches. Damascus is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.7 °F | 39.9 °F | 3.27 in. |
| February | 28.1 °F | 43.1 °F | 2.87 in. |
| March | 34.3 °F | 51.8 °F | 4.1 in. |
| April | 43.8 °F | 63.5 °F | 3.57 in. |
| May | 53.3 °F | 72.1 °F | 4.59 in. |
| June | 61.5 °F | 80.5 °F | 4.73 in. |
| July | 66.0 °F | 84.7 °F | 4.37 in. |
| August | 64.4 °F | 82.8 °F | 3.7 in. |
| September | 58.8 °F | 76.1 °F | 4.64 in. |
| October | 47.4 °F | 64.5 °F | 4.1 in. |
| November | 38.8 °F | 53.9 °F | 3.39 in. |
| December | 30.3 °F | 43.8 °F | 3.83 in. |
| Annual | 46 °F | 63.1 °F | 47.16 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |