Zihlman, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.1 °F (low) to 60.7 °F (high). Annual precipitation averages 43.9 Inches. 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 | 20.5 °F | 36.0 °F | 3.08 in. |
| February | 21.5 °F | 39.5 °F | 2.89 in. |
| March | 28.1 °F | 48.2 °F | 3.94 in. |
| April | 37.9 °F | 62.3 °F | 3.99 in. |
| May | 47.9 °F | 71.0 °F | 4.83 in. |
| June | 56.2 °F | 78.6 °F | 4.54 in. |
| July | 60.3 °F | 82.7 °F | 3.71 in. |
| August | 58.7 °F | 81.3 °F | 3.41 in. |
| September | 52.0 °F | 74.9 °F | 3.96 in. |
| October | 41.2 °F | 63.3 °F | 3.23 in. |
| November | 32.0 °F | 50.5 °F | 2.89 in. |
| December | 25.1 °F | 40.1 °F | 3.4 in. |
| Annual | 40.1 °F | 60.7 °F | 43.87 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |