Bivalve, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.5 °F (low) to 67.2 °F (high). Annual precipitation averages 46 Inches. Bivalve is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 29.0 °F | 45.3 °F | 3.37 in. |
| February | 29.9 °F | 47.6 °F | 2.93 in. |
| March | 36.6 °F | 55.0 °F | 4.1 in. |
| April | 46.7 °F | 66.8 °F | 3.49 in. |
| May | 56.6 °F | 75.1 °F | 3.73 in. |
| June | 65.8 °F | 83.6 °F | 4.1 in. |
| July | 70.8 °F | 88.0 °F | 4.4 in. |
| August | 69.2 °F | 86.0 °F | 4.71 in. |
| September | 63.1 °F | 80.5 °F | 4.22 in. |
| October | 51.8 °F | 70.0 °F | 3.98 in. |
| November | 40.9 °F | 58.7 °F | 3.21 in. |
| December | 33.5 °F | 49.5 °F | 3.72 in. |
| Annual | 49.5 °F | 67.2 °F | 45.96 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |