Barton, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.8 °C (low) to 16.8 °C (high). Annual precipitation averages 1071.1 Millimeters. Barton is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.9 °C | 3.2 °C | 73.41 mm |
| February | -5.3 °C | 5.2 °C | 71.37 mm |
| March | -1.7 °C | 10 °C | 96.01 mm |
| April | 3.5 °C | 17.8 °C | 93.98 mm |
| May | 8.8 °C | 22.5 °C | 115.32 mm |
| June | 13.6 °C | 26.7 °C | 109.98 mm |
| July | 15.9 °C | 29 °C | 101.09 mm |
| August | 15.1 °C | 28.3 °C | 92.2 mm |
| September | 11.3 °C | 24.8 °C | 98.81 mm |
| October | 5.3 °C | 18.2 °C | 76.2 mm |
| November | 0.1 °C | 11.1 °C | 65.28 mm |
| December | -3.7 °C | 5.3 °C | 77.47 mm |
| Annual | 4.8 °C | 16.8 °C | 1071.12 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |