Queenstown, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.2 °C (low) to 18.7 °C (high). Annual precipitation averages 1158.2 Millimeters. Queenstown is located in USDA Plant Hardiness Zone 8a. 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 | -2.2 °C | 6.2 °C | 83.31 mm |
| February | -1.5 °C | 7.4 °C | 71.88 mm |
| March | 2.2 °C | 11.8 °C | 102.87 mm |
| April | 7.8 °C | 18.4 °C | 87.88 mm |
| May | 13.1 °C | 23.3 °C | 103.89 mm |
| June | 18.3 °C | 28.2 °C | 110.49 mm |
| July | 21.2 °C | 30.7 °C | 108.2 mm |
| August | 20.1 °C | 29.6 °C | 107.95 mm |
| September | 16.6 °C | 26.2 °C | 108.2 mm |
| October | 10.2 °C | 20.1 °C | 98.81 mm |
| November | 4.6 °C | 13.8 °C | 79.25 mm |
| December | 0.4 °C | 8.6 °C | 95.5 mm |
| Annual | 9.2 °C | 18.7 °C | 1158.23 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°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 |