McCoole, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.4 °F (low) to 64.6 °F (high). Annual precipitation averages 38.7 Inches. McCoole 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 | 22.4 °F | 39.9 °F | 2.75 in. |
| February | 23.5 °F | 43.6 °F | 2.49 in. |
| March | 30.0 °F | 52.2 °F | 3.48 in. |
| April | 39.0 °F | 66.3 °F | 3.43 in. |
| May | 48.4 °F | 74.9 °F | 4.26 in. |
| June | 57.4 °F | 82.4 °F | 4.02 in. |
| July | 61.7 °F | 86.7 °F | 3.81 in. |
| August | 60.1 °F | 85.4 °F | 3.22 in. |
| September | 53.2 °F | 79.0 °F | 3.54 in. |
| October | 42.0 °F | 67.0 °F | 2.41 in. |
| November | 32.4 °F | 54.3 °F | 2.43 in. |
| December | 26.3 °F | 43.8 °F | 2.82 in. |
| Annual | 41.4 °F | 64.6 °F | 38.66 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |