Georgetown, Delaware has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.9 °F (low) to 65.9 °F (high). Annual precipitation averages 46.9 Inches. Georgetown is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.6 °F | 44.1 °F | 3.47 in. |
| February | 26.7 °F | 46.9 °F | 3.06 in. |
| March | 33.2 °F | 53.7 °F | 4.29 in. |
| April | 43.4 °F | 64.5 °F | 3.56 in. |
| May | 53.2 °F | 73.4 °F | 3.71 in. |
| June | 62.8 °F | 82.1 °F | 4.18 in. |
| July | 67.5 °F | 86.9 °F | 4.13 in. |
| August | 65.3 °F | 84.9 °F | 4.66 in. |
| September | 59.3 °F | 79.1 °F | 4.34 in. |
| October | 47.6 °F | 68.6 °F | 4.15 in. |
| November | 36.4 °F | 58.1 °F | 3.4 in. |
| December | 29.9 °F | 49.0 °F | 3.95 in. |
| Annual | 45.9 °F | 65.9 °F | 46.9 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |