Mount Lena, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44 °F (low) to 64.3 °F (high). Annual precipitation averages 43 Inches. Mount Lena is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.1 °F | 40.4 °F | 3.13 in. |
| February | 25.1 °F | 44.0 °F | 2.49 in. |
| March | 32.6 °F | 52.4 °F | 3.67 in. |
| April | 42.0 °F | 64.8 °F | 3.84 in. |
| May | 51.5 °F | 73.6 °F | 4.33 in. |
| June | 60.5 °F | 82.2 °F | 3.83 in. |
| July | 64.7 °F | 86.6 °F | 3.77 in. |
| August | 63.0 °F | 84.9 °F | 3.47 in. |
| September | 56.0 °F | 77.9 °F | 4.16 in. |
| October | 45.4 °F | 66.4 °F | 3.67 in. |
| November | 35.2 °F | 54.7 °F | 3.23 in. |
| December | 28.0 °F | 44.0 °F | 3.36 in. |
| Annual | 44 °F | 64.3 °F | 42.95 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°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 |