Manchester, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.6 °F (low) to 63.6 °F (high). Annual precipitation averages 47.4 Inches. Manchester 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 | 25.0 °F | 39.0 °F | 3.44 in. |
| February | 26.7 °F | 42.7 °F | 2.81 in. |
| March | 33.0 °F | 51.4 °F | 4.05 in. |
| April | 43.5 °F | 64.4 °F | 3.75 in. |
| May | 52.6 °F | 73.7 °F | 4.19 in. |
| June | 61.9 °F | 81.6 °F | 3.99 in. |
| July | 66.3 °F | 86.0 °F | 4.55 in. |
| August | 64.6 °F | 84.0 °F | 4.02 in. |
| September | 58.3 °F | 77.5 °F | 5.17 in. |
| October | 47.4 °F | 65.8 °F | 4.17 in. |
| November | 37.7 °F | 53.8 °F | 3.31 in. |
| December | 30.0 °F | 43.4 °F | 3.9 in. |
| Annual | 45.6 °F | 63.6 °F | 47.35 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |