Friendly, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.9 °F (low) to 66.7 °F (high). Annual precipitation averages 45.9 Inches. Friendly is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 27.2 °F | 43.9 °F | 3.08 in. |
| February | 28.9 °F | 47.1 °F | 2.73 in. |
| March | 35.6 °F | 55.3 °F | 3.86 in. |
| April | 45.7 °F | 66.9 °F | 3.44 in. |
| May | 55.3 °F | 75.3 °F | 4.46 in. |
| June | 64.6 °F | 83.7 °F | 4.61 in. |
| July | 69.4 °F | 88.2 °F | 4.7 in. |
| August | 67.7 °F | 86.4 °F | 3.8 in. |
| September | 61.1 °F | 79.7 °F | 4.39 in. |
| October | 49.3 °F | 68.1 °F | 3.89 in. |
| November | 38.8 °F | 57.4 °F | 3.12 in. |
| December | 31.6 °F | 47.8 °F | 3.77 in. |
| Annual | 47.9 °F | 66.7 °F | 45.85 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 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 |