Eldersburg, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.8 °F (low) to 65.3 °F (high). Annual precipitation averages 47.2 Inches. Eldersburg is located in USDA Plant Hardiness Zone 7a. 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 | 24.3 °F | 41.4 °F | 3.45 in. |
| February | 26.0 °F | 44.6 °F | 2.87 in. |
| March | 32.7 °F | 53.3 °F | 4.16 in. |
| April | 42.7 °F | 65.9 °F | 3.71 in. |
| May | 52.2 °F | 75.1 °F | 4.41 in. |
| June | 61.2 °F | 83.4 °F | 4.31 in. |
| July | 65.8 °F | 87.5 °F | 4.34 in. |
| August | 64.0 °F | 85.4 °F | 3.93 in. |
| September | 57.4 °F | 78.8 °F | 4.64 in. |
| October | 45.8 °F | 67.0 °F | 4.16 in. |
| November | 36.3 °F | 55.5 °F | 3.31 in. |
| December | 29.1 °F | 45.5 °F | 3.95 in. |
| Annual | 44.8 °F | 65.3 °F | 47.24 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |