Burtonsville, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.2 °C (low) to 18.9 °C (high). Annual precipitation averages 1194.1 Millimeters. Burtonsville is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.2 °C | 5.9 °C | 81.28 mm |
| February | -2.3 °C | 7.7 °C | 72.64 mm |
| March | 1.3 °C | 12.7 °C | 105.16 mm |
| April | 7 °C | 19.2 °C | 91.69 mm |
| May | 12.7 °C | 23.9 °C | 116.08 mm |
| June | 17.3 °C | 28.6 °C | 118.11 mm |
| July | 19.9 °C | 30.9 °C | 112.52 mm |
| August | 19.1 °C | 29.8 °C | 95.25 mm |
| September | 15.4 °C | 26.2 °C | 118.87 mm |
| October | 9 °C | 19.8 °C | 101.6 mm |
| November | 3.3 °C | 13.7 °C | 83.06 mm |
| December | -0.6 °C | 8.2 °C | 97.79 mm |
| Annual | 8.2 °C | 18.9 °C | 1194.05 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |