Betterton, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.5 °C (low) to 18.7 °C (high). Annual precipitation averages 1204.2 Millimeters. Betterton is located in USDA Plant Hardiness Zone 7b. 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 | -3.1 °C | 5.9 °C | 90.93 mm |
| February | -2.4 °C | 7.3 °C | 73.91 mm |
| March | 1.3 °C | 11.9 °C | 104.39 mm |
| April | 7.2 °C | 18.3 °C | 92.96 mm |
| May | 12.4 °C | 23.6 °C | 102.11 mm |
| June | 17.8 °C | 28.3 °C | 115.82 mm |
| July | 20.6 °C | 30.9 °C | 114.3 mm |
| August | 19.7 °C | 30.2 °C | 107.7 mm |
| September | 15.9 °C | 26.5 °C | 119.89 mm |
| October | 9.5 °C | 20.1 °C | 101.35 mm |
| November | 3.8 °C | 13.5 °C | 83.31 mm |
| December | -0.4 °C | 8.2 °C | 97.54 mm |
| Annual | 8.5 °C | 18.7 °C | 1204.21 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 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |