Potomac Park, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6 °C (low) to 18.5 °C (high). Annual precipitation averages 1023.6 Millimeters. Potomac Park is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.7 °C | 4.8 °C | 65.28 mm |
| February | -3.9 °C | 6.9 °C | 65.28 mm |
| March | -0.4 °C | 11.8 °C | 89.66 mm |
| April | 4.7 °C | 19.4 °C | 89.66 mm |
| May | 10 °C | 24.2 °C | 114.3 mm |
| June | 15 °C | 28.4 °C | 102.87 mm |
| July | 17.3 °C | 30.9 °C | 90.68 mm |
| August | 16.4 °C | 29.9 °C | 79.76 mm |
| September | 12.6 °C | 26.3 °C | 99.31 mm |
| October | 6.1 °C | 19.8 °C | 77.22 mm |
| November | 0.8 °C | 12.7 °C | 68.83 mm |
| December | -2.5 °C | 6.9 °C | 80.77 mm |
| Annual | 6 °C | 18.5 °C | 1023.62 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |