Crofton, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.5 °F (low) to 66.2 °F (high). Annual precipitation averages 47.4 Inches. Crofton is located in USDA Plant Hardiness Zone 7b. 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 | 25.2 °F | 43.4 °F | 3.18 in. |
| February | 26.6 °F | 46.3 °F | 2.84 in. |
| March | 33.4 °F | 54.4 °F | 4.15 in. |
| April | 43.3 °F | 66.3 °F | 3.51 in. |
| May | 53.1 °F | 74.8 °F | 4.3 in. |
| June | 62.4 °F | 83.3 °F | 4.63 in. |
| July | 67.1 °F | 87.8 °F | 4.95 in. |
| August | 65.4 °F | 86.1 °F | 3.92 in. |
| September | 58.6 °F | 79.6 °F | 4.94 in. |
| October | 46.1 °F | 68.1 °F | 3.98 in. |
| November | 36.0 °F | 57.1 °F | 3.24 in. |
| December | 29.3 °F | 47.4 °F | 3.79 in. |
| Annual | 45.5 °F | 66.2 °F | 47.43 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 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |