Frederica, Delaware has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.1 °C (low) to 18.7 °C (high). Annual precipitation averages 1189.7 Millimeters. Frederica 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 | -3.3 °C | 6.6 °C | 86.61 mm |
| February | -2.7 °C | 7.9 °C | 76.71 mm |
| March | 1.2 °C | 12 °C | 107.44 mm |
| April | 6.7 °C | 18 °C | 90.42 mm |
| May | 12 °C | 23 °C | 99.06 mm |
| June | 17.2 °C | 27.8 °C | 103.89 mm |
| July | 20.2 °C | 30.4 °C | 107.95 mm |
| August | 19.1 °C | 29.3 °C | 120.14 mm |
| September | 15.5 °C | 26 °C | 113.28 mm |
| October | 8.9 °C | 20 °C | 101.09 mm |
| November | 3.1 °C | 14.1 °C | 81.79 mm |
| December | -0.7 °C | 9 °C | 101.35 mm |
| Annual | 8.1 °C | 18.7 °C | 1189.73 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 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |