Whaleyville, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.1 °C (low) to 19.4 °C (high). Annual precipitation averages 1217.7 Millimeters. Whaleyville 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 | -2.8 °C | 7.6 °C | 90.68 mm |
| February | -2.2 °C | 8.9 °C | 80.01 mm |
| March | 1.3 °C | 12.8 °C | 108.97 mm |
| April | 6.7 °C | 18.6 °C | 87.38 mm |
| May | 12 °C | 23.3 °C | 93.22 mm |
| June | 17.2 °C | 28 °C | 100.84 mm |
| July | 19.9 °C | 30.8 °C | 113.03 mm |
| August | 18.7 °C | 29.7 °C | 129.03 mm |
| September | 15.4 °C | 26.7 °C | 111.25 mm |
| October | 8.9 °C | 21 °C | 111.25 mm |
| November | 3.1 °C | 15.1 °C | 85.34 mm |
| December | -0.5 °C | 10.1 °C | 106.68 mm |
| Annual | 8.1 °C | 19.4 °C | 1217.68 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |