Lansdowne, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.6 °F (low) to 66.1 °F (high). Annual precipitation averages 47.3 Inches. Lansdowne 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 | 27.0 °F | 43.2 °F | 3.33 in. |
| February | 28.5 °F | 45.7 °F | 2.96 in. |
| March | 35.3 °F | 53.9 °F | 4.31 in. |
| April | 45.4 °F | 65.8 °F | 3.67 in. |
| May | 55.1 °F | 74.8 °F | 4.17 in. |
| June | 64.4 °F | 83.8 °F | 4.42 in. |
| July | 69.2 °F | 88.1 °F | 4.36 in. |
| August | 67.4 °F | 86.2 °F | 4.0 in. |
| September | 60.6 °F | 79.5 °F | 4.61 in. |
| October | 48.6 °F | 68.0 °F | 4.16 in. |
| November | 38.6 °F | 57.0 °F | 3.3 in. |
| December | 31.4 °F | 47.4 °F | 4.0 in. |
| Annual | 47.6 °F | 66.1 °F | 47.29 in. |
| 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 : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |