McSherrystown, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.3 °F (low) to 63.6 °F (high). Annual precipitation averages 44.1 Inches. McSherrystown is located in USDA Plant Hardiness Zone 6b. 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 | 39.4 °F | 3.15 in. |
| February | 23.8 °F | 42.4 °F | 2.62 in. |
| March | 30.9 °F | 51.2 °F | 3.9 in. |
| April | 41.3 °F | 63.7 °F | 3.49 in. |
| May | 50.9 °F | 73.0 °F | 4.04 in. |
| June | 60.4 °F | 81.6 °F | 3.73 in. |
| July | 64.7 °F | 86.0 °F | 4.18 in. |
| August | 62.8 °F | 84.2 °F | 3.71 in. |
| September | 55.8 °F | 77.5 °F | 4.78 in. |
| October | 44.3 °F | 65.5 °F | 3.85 in. |
| November | 34.6 °F | 54.5 °F | 3.1 in. |
| December | 27.2 °F | 43.7 °F | 3.52 in. |
| Annual | 43.3 °F | 63.6 °F | 44.07 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |