Zihlman, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.5 °C (low) to 16 °C (high). Annual precipitation averages 1114.3 Millimeters. Zihlman 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 | -6.4 °C | 2.2 °C | 78.23 mm |
| February | -5.8 °C | 4.2 °C | 73.41 mm |
| March | -2.2 °C | 9 °C | 100.08 mm |
| April | 3.3 °C | 16.8 °C | 101.35 mm |
| May | 8.8 °C | 21.7 °C | 122.68 mm |
| June | 13.4 °C | 25.9 °C | 115.32 mm |
| July | 15.7 °C | 28.2 °C | 94.23 mm |
| August | 14.8 °C | 27.4 °C | 86.61 mm |
| September | 11.1 °C | 23.8 °C | 100.58 mm |
| October | 5.1 °C | 17.4 °C | 82.04 mm |
| November | 0 °C | 10.3 °C | 73.41 mm |
| December | -3.8 °C | 4.5 °C | 86.36 mm |
| Annual | 4.5 °C | 16 °C | 1114.3 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |