Barton, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.5 °F (low) to 62.3 °F (high). Annual precipitation averages 42.2 Inches. 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 | 21.4 °F | 37.7 °F | 2.89 in. |
| February | 22.4 °F | 41.4 °F | 2.81 in. |
| March | 28.9 °F | 50.0 °F | 3.78 in. |
| April | 38.3 °F | 64.0 °F | 3.7 in. |
| May | 47.8 °F | 72.5 °F | 4.54 in. |
| June | 56.5 °F | 80.0 °F | 4.33 in. |
| July | 60.6 °F | 84.2 °F | 3.98 in. |
| August | 59.1 °F | 82.9 °F | 3.63 in. |
| September | 52.3 °F | 76.6 °F | 3.89 in. |
| October | 41.5 °F | 64.8 °F | 3.0 in. |
| November | 32.1 °F | 52.0 °F | 2.57 in. |
| December | 25.4 °F | 41.6 °F | 3.05 in. |
| Annual | 40.5 °F | 62.3 °F | 42.17 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |