Gapland, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.3 °C (low) to 18.1 °C (high). Annual precipitation averages 1099.8 Millimeters. Gapland is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.6 °C | 5.1 °C | 79.25 mm |
| February | -3.9 °C | 7.1 °C | 62.48 mm |
| March | 0.2 °C | 11.6 °C | 93.22 mm |
| April | 5.3 °C | 18.2 °C | 92.46 mm |
| May | 10.4 °C | 23.1 °C | 112.52 mm |
| June | 15.5 °C | 27.8 °C | 101.09 mm |
| July | 17.8 °C | 30.3 °C | 102.87 mm |
| August | 16.8 °C | 29.4 °C | 85.85 mm |
| September | 12.9 °C | 25.5 °C | 111.51 mm |
| October | 6.9 °C | 19.2 °C | 89.66 mm |
| November | 1.4 °C | 12.9 °C | 80.52 mm |
| December | -2.8 °C | 7.1 °C | 88.39 mm |
| Annual | 6.3 °C | 18.1 °C | 1099.82 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |