Accokeek, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.7 °C (low) to 19.5 °C (high). Annual precipitation averages 1150.6 Millimeters. Accokeek is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.7 °C | 6.8 °C | 77.98 mm |
| February | -1.7 °C | 8.8 °C | 69.09 mm |
| March | 2 °C | 13.4 °C | 98.04 mm |
| April | 7.5 °C | 19.9 °C | 85.6 mm |
| May | 12.8 °C | 24.4 °C | 110.24 mm |
| June | 17.9 °C | 28.9 °C | 113.28 mm |
| July | 20.6 °C | 31.4 °C | 114.05 mm |
| August | 19.7 °C | 30.4 °C | 96.27 mm |
| September | 16.1 °C | 26.8 °C | 111 mm |
| October | 9.4 °C | 20.4 °C | 98.81 mm |
| November | 3.6 °C | 14.3 °C | 81.03 mm |
| December | -0.3 °C | 9 °C | 95.25 mm |
| Annual | 8.7 °C | 19.5 °C | 1150.64 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |