Baltimore Highlands, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.3 °F (low) to 66 °F (high). Annual precipitation averages 47.1 Inches. Baltimore Highlands is located in USDA Plant Hardiness Zone 8a. 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 | 27.6 °F | 43.2 °F | 3.32 in. |
| February | 29.0 °F | 45.5 °F | 2.94 in. |
| March | 35.9 °F | 53.7 °F | 4.29 in. |
| April | 46.1 °F | 65.5 °F | 3.66 in. |
| May | 55.7 °F | 74.5 °F | 4.13 in. |
| June | 65.0 °F | 83.7 °F | 4.42 in. |
| July | 70.0 °F | 88.1 °F | 4.33 in. |
| August | 68.1 °F | 86.1 °F | 4.0 in. |
| September | 61.4 °F | 79.5 °F | 4.59 in. |
| October | 49.5 °F | 68.0 °F | 4.16 in. |
| November | 39.3 °F | 57.0 °F | 3.29 in. |
| December | 32.0 °F | 47.5 °F | 3.98 in. |
| Annual | 48.3 °F | 66 °F | 47.11 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 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |