Hockessin, Delaware has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.9 °C (low) to 17.3 °C (high). Annual precipitation averages 1224 Millimeters. Hockessin is located in USDA Plant Hardiness Zone 7a. 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 | -4.7 °C | 4.4 °C | 89.66 mm |
| February | -4.3 °C | 5.6 °C | 73.15 mm |
| March | -0.2 °C | 10.3 °C | 110.24 mm |
| April | 5.6 °C | 16.9 °C | 94.74 mm |
| May | 11.1 °C | 22.3 °C | 98.04 mm |
| June | 16.1 °C | 27.2 °C | 115.57 mm |
| July | 19 °C | 29.7 °C | 123.7 mm |
| August | 18.2 °C | 28.8 °C | 109.22 mm |
| September | 14.2 °C | 25.2 °C | 117.35 mm |
| October | 7.5 °C | 18.6 °C | 106.68 mm |
| November | 2.1 °C | 12.2 °C | 83.57 mm |
| December | -1.8 °C | 6.8 °C | 102.11 mm |
| Annual | 6.9 °C | 17.3 °C | 1224.03 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 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |