Lonaconing, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.7 °C (low) to 16.1 °C (high). Annual precipitation averages 1105.7 Millimeters. Lonaconing is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.2 °C | 2.4 °C | 77.98 mm |
| February | -5.6 °C | 4.3 °C | 73.15 mm |
| March | -1.9 °C | 9.2 °C | 95.25 mm |
| April | 3.5 °C | 17.1 °C | 98.55 mm |
| May | 8.9 °C | 21.8 °C | 120.4 mm |
| June | 13.6 °C | 26 °C | 114.81 mm |
| July | 15.9 °C | 28.3 °C | 98.81 mm |
| August | 15.1 °C | 27.6 °C | 94.23 mm |
| September | 11.3 °C | 24.1 °C | 99.57 mm |
| October | 5.3 °C | 17.6 °C | 78.99 mm |
| November | 0.1 °C | 10.5 °C | 71.37 mm |
| December | -3.8 °C | 4.8 °C | 82.55 mm |
| Annual | 4.7 °C | 16.1 °C | 1105.66 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |