Frankford, Delaware has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.1 °C (low) to 19.1 °C (high). Annual precipitation averages 1233.7 Millimeters. Frankford 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 | -3.1 °C | 7.3 °C | 91.69 mm |
| February | -2.3 °C | 8.6 °C | 81.53 mm |
| March | 1.1 °C | 12.3 °C | 109.98 mm |
| April | 6.6 °C | 18.2 °C | 87.12 mm |
| May | 11.9 °C | 23 °C | 94.23 mm |
| June | 17.2 °C | 27.7 °C | 100.84 mm |
| July | 19.8 °C | 30.5 °C | 116.59 mm |
| August | 18.8 °C | 29.4 °C | 131.57 mm |
| September | 15.8 °C | 26.3 °C | 106.68 mm |
| October | 9.3 °C | 20.7 °C | 115.57 mm |
| November | 3.3 °C | 14.8 °C | 86.36 mm |
| December | -0.7 °C | 9.9 °C | 111.51 mm |
| Annual | 8.1 °C | 19.1 °C | 1233.67 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 |