Federalsburg, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.1 °C (low) to 19.3 °C (high). Annual precipitation averages 1163.1 Millimeters. Federalsburg is located in USDA Plant Hardiness Zone 7b. 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 | -3.1 °C | 6.8 °C | 85.6 mm |
| February | -2.5 °C | 8.3 °C | 74.17 mm |
| March | 0.9 °C | 12.5 °C | 103.38 mm |
| April | 6.8 °C | 18.7 °C | 90.17 mm |
| May | 12.2 °C | 23.8 °C | 97.03 mm |
| June | 17.4 °C | 28.8 °C | 106.68 mm |
| July | 20 °C | 31 °C | 107.19 mm |
| August | 18.6 °C | 29.7 °C | 117.35 mm |
| September | 15.2 °C | 26.7 °C | 104.9 mm |
| October | 8.9 °C | 20.9 °C | 99.82 mm |
| November | 2.9 °C | 14.6 °C | 80.77 mm |
| December | -0.7 °C | 9.4 °C | 96.01 mm |
| Annual | 8.1 °C | 19.3 °C | 1163.07 mm |
| 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 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 |