Lusby, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.1 °F (low) to 66.5 °F (high). Annual precipitation averages 45.9 Inches. Lusby is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 29.4 °F | 45.0 °F | 3.17 in. |
| February | 30.6 °F | 47.4 °F | 2.9 in. |
| March | 37.1 °F | 54.4 °F | 4.3 in. |
| April | 47.3 °F | 65.6 °F | 3.3 in. |
| May | 57.5 °F | 74.3 °F | 3.89 in. |
| June | 66.4 °F | 82.9 °F | 4.26 in. |
| July | 71.3 °F | 87.1 °F | 4.49 in. |
| August | 69.7 °F | 85.2 °F | 4.44 in. |
| September | 63.8 °F | 79.5 °F | 4.29 in. |
| October | 52.2 °F | 68.8 °F | 4.0 in. |
| November | 41.4 °F | 58.1 °F | 3.15 in. |
| December | 34.5 °F | 49.7 °F | 3.72 in. |
| Annual | 50.1 °F | 66.5 °F | 45.91 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |