Hebron, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.3 °C (low) to 19.8 °C (high). Annual precipitation averages 1172.2 Millimeters. Hebron 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 Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.6 °C | 7.8 °C | 86.36 mm |
| February | -2.1 °C | 9.2 °C | 75.44 mm |
| March | 1.4 °C | 13.1 °C | 103.38 mm |
| April | 6.8 °C | 19.5 °C | 89.41 mm |
| May | 12.2 °C | 24.2 °C | 93.73 mm |
| June | 17.3 °C | 28.7 °C | 106.68 mm |
| July | 20.1 °C | 31.2 °C | 107.19 mm |
| August | 18.8 °C | 29.9 °C | 122.68 mm |
| September | 15.4 °C | 27.1 °C | 111 mm |
| October | 9.1 °C | 21.2 °C | 98.55 mm |
| November | 3.3 °C | 15.2 °C | 82.8 mm |
| December | -0.4 °C | 10.2 °C | 95 mm |
| Annual | 8.3 °C | 19.8 °C | 1172.22 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 |