Edgemoor, Delaware has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.2 °C (low) to 17.6 °C (high). Annual precipitation averages 1204.7 Millimeters. Edgemoor is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.5 °C | 4.7 °C | 89.92 mm |
| February | -2.9 °C | 6.1 °C | 73.91 mm |
| March | 1.1 °C | 10.3 °C | 111 mm |
| April | 6.9 °C | 17.1 °C | 97.03 mm |
| May | 12.2 °C | 22.3 °C | 96.01 mm |
| June | 17.5 °C | 27.3 °C | 116.33 mm |
| July | 20.5 °C | 29.8 °C | 122.68 mm |
| August | 19.6 °C | 28.9 °C | 109.98 mm |
| September | 15.7 °C | 25.4 °C | 108.97 mm |
| October | 9 °C | 18.9 °C | 95.76 mm |
| November | 3.3 °C | 12.9 °C | 76.45 mm |
| December | -0.7 °C | 7.5 °C | 106.68 mm |
| Annual | 8.2 °C | 17.6 °C | 1204.72 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 |