Trappe, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.2 °C (low) to 19.4 °C (high). Annual precipitation averages 1158.2 Millimeters. Trappe 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 | -2 °C | 7.1 °C | 84.84 mm |
| February | -1.4 °C | 8.5 °C | 72.14 mm |
| March | 2.3 °C | 12.7 °C | 106.93 mm |
| April | 7.8 °C | 19.2 °C | 86.61 mm |
| May | 13.1 °C | 23.8 °C | 98.55 mm |
| June | 18.2 °C | 28.7 °C | 102.62 mm |
| July | 20.9 °C | 31.2 °C | 113.03 mm |
| August | 19.8 °C | 30 °C | 115.57 mm |
| September | 16.3 °C | 26.8 °C | 98.3 mm |
| October | 10.1 °C | 20.7 °C | 102.36 mm |
| November | 4.4 °C | 14.7 °C | 81.79 mm |
| December | 0.5 °C | 9.4 °C | 95.5 mm |
| Annual | 9.2 °C | 19.4 °C | 1158.24 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |