Calvert Beach, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.4 °C (low) to 18.9 °C (high). Annual precipitation averages 1164.6 Millimeters. 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 | -1.2 °C | 7.1 °C | 81.28 mm |
| February | -0.7 °C | 8.2 °C | 71.88 mm |
| March | 2.9 °C | 12.2 °C | 103.12 mm |
| April | 8.6 °C | 18.4 °C | 84.07 mm |
| May | 14.2 °C | 23.2 °C | 104.65 mm |
| June | 19.3 °C | 27.9 °C | 107.7 mm |
| July | 22.1 °C | 30.3 °C | 113.28 mm |
| August | 21.5 °C | 29.3 °C | 110.49 mm |
| September | 18.1 °C | 26.2 °C | 110.24 mm |
| October | 11.8 °C | 20.3 °C | 102.36 mm |
| November | 5.9 °C | 14.3 °C | 80.52 mm |
| December | 1.7 °C | 9.7 °C | 95 mm |
| Annual | 10.4 °C | 18.9 °C | 1164.59 mm |
| 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 : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |