Brunswick, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.3 °F (low) to 65.5 °F (high). Annual precipitation averages 42 Inches. Brunswick 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 | 24.0 °F | 41.5 °F | 3.01 in. |
| February | 25.5 °F | 44.9 °F | 2.39 in. |
| March | 32.1 °F | 53.6 °F | 3.54 in. |
| April | 42.2 °F | 66.0 °F | 3.35 in. |
| May | 52.2 °F | 74.8 °F | 4.26 in. |
| June | 61.1 °F | 83.1 °F | 3.92 in. |
| July | 65.7 °F | 87.7 °F | 4.04 in. |
| August | 63.7 °F | 85.7 °F | 3.21 in. |
| September | 56.7 °F | 79.2 °F | 4.44 in. |
| October | 45.1 °F | 68.0 °F | 3.41 in. |
| November | 34.8 °F | 56.0 °F | 3.05 in. |
| December | 28.3 °F | 45.6 °F | 3.42 in. |
| Annual | 44.3 °F | 65.5 °F | 42.04 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |