Calvert Beach, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.6 °F (low) to 66.1 °F (high). Annual precipitation averages 45.9 Inches. Calvert Beach 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 29.8 °F | 44.7 °F | 3.2 in. |
| February | 30.8 °F | 46.7 °F | 2.83 in. |
| March | 37.3 °F | 54.0 °F | 4.06 in. |
| April | 47.4 °F | 65.1 °F | 3.31 in. |
| May | 57.6 °F | 73.8 °F | 4.12 in. |
| June | 66.8 °F | 82.3 °F | 4.24 in. |
| July | 71.8 °F | 86.5 °F | 4.46 in. |
| August | 70.7 °F | 84.7 °F | 4.35 in. |
| September | 64.5 °F | 79.1 °F | 4.34 in. |
| October | 53.2 °F | 68.5 °F | 4.03 in. |
| November | 42.7 °F | 57.8 °F | 3.17 in. |
| December | 35.0 °F | 49.5 °F | 3.74 in. |
| Annual | 50.6 °F | 66.1 °F | 45.85 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |