Lutherville, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.8 °F (low) to 65.6 °F (high). Annual precipitation averages 48.5 Inches. Lutherville is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.1 °F | 42.4 °F | 3.46 in. |
| February | 26.6 °F | 45.2 °F | 2.93 in. |
| March | 33.3 °F | 53.5 °F | 4.32 in. |
| April | 43.7 °F | 65.6 °F | 3.82 in. |
| May | 53.3 °F | 74.6 °F | 4.31 in. |
| June | 62.5 °F | 83.2 °F | 4.27 in. |
| July | 67.5 °F | 87.6 °F | 4.49 in. |
| August | 65.6 °F | 85.7 °F | 4.17 in. |
| September | 58.9 °F | 79.0 °F | 4.76 in. |
| October | 47.1 °F | 67.5 °F | 4.46 in. |
| November | 36.8 °F | 56.4 °F | 3.45 in. |
| December | 29.7 °F | 46.5 °F | 4.1 in. |
| Annual | 45.8 °F | 65.6 °F | 48.54 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |