Elkridge, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.4 °C (low) to 19 °C (high). Annual precipitation averages 1216.7 Millimeters. Elkridge 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 | -3 °C | 6.2 °C | 84.33 mm |
| February | -2.2 °C | 7.7 °C | 77.47 mm |
| March | 1.6 °C | 12.3 °C | 111.25 mm |
| April | 7.2 °C | 19 °C | 93.47 mm |
| May | 12.6 °C | 23.9 °C | 111 mm |
| June | 17.7 °C | 28.8 °C | 112.01 mm |
| July | 20.4 °C | 31.2 °C | 115.57 mm |
| August | 19.4 °C | 30.2 °C | 102.11 mm |
| September | 15.6 °C | 26.4 °C | 118.11 mm |
| October | 9.1 °C | 20.1 °C | 103.89 mm |
| November | 3.4 °C | 13.9 °C | 84.33 mm |
| December | -0.6 °C | 8.5 °C | 103.12 mm |
| Annual | 8.4 °C | 19 °C | 1216.66 mm |
| 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 : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |