Ardentown, Delaware has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.6 °C (low) to 17.3 °C (high). Annual precipitation averages 1186.2 Millimeters. Ardentown 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 | -4.2 °C | 4.4 °C | 90.17 mm |
| February | -3.6 °C | 5.7 °C | 73.41 mm |
| March | 0.4 °C | 10.2 °C | 109.98 mm |
| April | 6.2 °C | 16.9 °C | 94.49 mm |
| May | 11.6 °C | 22.2 °C | 94.74 mm |
| June | 16.8 °C | 27.2 °C | 115.57 mm |
| July | 19.9 °C | 29.7 °C | 121.92 mm |
| August | 18.9 °C | 28.7 °C | 109.22 mm |
| September | 15.1 °C | 25.2 °C | 107.19 mm |
| October | 8.3 °C | 18.6 °C | 93.73 mm |
| November | 2.7 °C | 12.4 °C | 73.91 mm |
| December | -1.3 °C | 6.9 °C | 101.85 mm |
| Annual | 7.6 °C | 17.3 °C | 1186.18 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |