Dagsboro, Delaware has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8 °C (low) to 18.9 °C (high). Annual precipitation averages 1224.5 Millimeters. Dagsboro 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.2 °C | 7.2 °C | 90.93 mm |
| February | -2.4 °C | 8.4 °C | 80.77 mm |
| March | 1 °C | 12.1 °C | 109.73 mm |
| April | 6.6 °C | 18 °C | 87.63 mm |
| May | 11.9 °C | 22.8 °C | 93.73 mm |
| June | 17.2 °C | 27.6 °C | 101.09 mm |
| July | 19.8 °C | 30.4 °C | 114.81 mm |
| August | 18.8 °C | 29.4 °C | 128.27 mm |
| September | 15.5 °C | 26.3 °C | 107.7 mm |
| October | 8.8 °C | 20.7 °C | 114.05 mm |
| November | 2.9 °C | 14.7 °C | 86.36 mm |
| December | -0.7 °C | 9.7 °C | 109.47 mm |
| Annual | 8 °C | 18.9 °C | 1224.54 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |