Severna Park, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.2 °F (low) to 65.5 °F (high). Annual precipitation averages 46.2 Inches. Severna Park is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.0 °F | 43.1 °F | 3.17 in. |
| February | 29.3 °F | 45.3 °F | 2.76 in. |
| March | 36.2 °F | 53.1 °F | 4.21 in. |
| April | 46.7 °F | 65.1 °F | 3.48 in. |
| May | 56.4 °F | 73.9 °F | 4.23 in. |
| June | 66.0 °F | 82.9 °F | 4.5 in. |
| July | 71.0 °F | 87.3 °F | 4.43 in. |
| August | 69.6 °F | 85.4 °F | 3.99 in. |
| September | 63.1 °F | 78.9 °F | 4.55 in. |
| October | 51.3 °F | 67.7 °F | 3.91 in. |
| November | 40.6 °F | 56.5 °F | 3.12 in. |
| December | 32.7 °F | 47.3 °F | 3.81 in. |
| Annual | 49.2 °F | 65.5 °F | 46.16 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |