Hampstead, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.9 °F (low) to 63.9 °F (high). Annual precipitation averages 47.3 Inches. Hampstead 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 | 24.4 °F | 39.5 °F | 3.47 in. |
| February | 26.1 °F | 42.9 °F | 2.77 in. |
| March | 32.6 °F | 51.7 °F | 4.08 in. |
| April | 42.8 °F | 64.5 °F | 3.7 in. |
| May | 51.9 °F | 73.7 °F | 4.2 in. |
| June | 61.2 °F | 82.0 °F | 4.0 in. |
| July | 65.3 °F | 86.3 °F | 4.61 in. |
| August | 63.7 °F | 84.3 °F | 3.96 in. |
| September | 57.4 °F | 77.8 °F | 5.07 in. |
| October | 46.5 °F | 66.0 °F | 4.22 in. |
| November | 37.0 °F | 54.1 °F | 3.32 in. |
| December | 29.4 °F | 43.8 °F | 3.9 in. |
| Annual | 44.9 °F | 63.9 °F | 47.3 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 |