Edgewood, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.7 °C (low) to 18.4 °C (high). Annual precipitation averages 1237.7 Millimeters. Edgewood 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 | -2.8 °C | 5.6 °C | 87.88 mm |
| February | -2.2 °C | 6.9 °C | 71.37 mm |
| March | 1.6 °C | 11.4 °C | 109.98 mm |
| April | 7.3 °C | 18 °C | 93.98 mm |
| May | 12.7 °C | 23.2 °C | 106.17 mm |
| June | 18 °C | 28.1 °C | 117.35 mm |
| July | 20.8 °C | 30.6 °C | 116.59 mm |
| August | 19.9 °C | 29.7 °C | 110.24 mm |
| September | 16.2 °C | 26.1 °C | 120.65 mm |
| October | 9.6 °C | 19.7 °C | 113.03 mm |
| November | 3.8 °C | 13.3 °C | 85.09 mm |
| December | -0.3 °C | 8 °C | 105.41 mm |
| Annual | 8.7 °C | 18.4 °C | 1237.74 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 |