Eldorado, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.2 °C (low) to 19.6 °C (high). Annual precipitation averages 1156.7 Millimeters. Eldorado 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 | -2.8 °C | 7.2 °C | 84.58 mm |
| February | -2.2 °C | 8.7 °C | 73.91 mm |
| March | 1.2 °C | 12.8 °C | 103.12 mm |
| April | 6.9 °C | 19.1 °C | 89.15 mm |
| May | 12.3 °C | 24.2 °C | 95.76 mm |
| June | 17.4 °C | 29 °C | 108.46 mm |
| July | 20.1 °C | 31.2 °C | 107.19 mm |
| August | 18.7 °C | 29.9 °C | 117.6 mm |
| September | 15.3 °C | 27 °C | 104.14 mm |
| October | 9.1 °C | 21.2 °C | 97.03 mm |
| November | 3.2 °C | 14.8 °C | 80.26 mm |
| December | -0.4 °C | 9.8 °C | 95.5 mm |
| Annual | 8.2 °C | 19.6 °C | 1156.7 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 7b : -15°C to -12.2°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |