Fairlee, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.9 °F (low) to 65.4 °F (high). Annual precipitation averages 45.7 Inches. Fairlee 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 | 27.2 °F | 42.5 °F | 3.29 in. |
| February | 28.3 °F | 45.0 °F | 2.77 in. |
| March | 35.1 °F | 53.0 °F | 4.09 in. |
| April | 45.3 °F | 64.6 °F | 3.51 in. |
| May | 54.9 °F | 73.8 °F | 4.13 in. |
| June | 64.4 °F | 82.6 °F | 4.39 in. |
| July | 69.5 °F | 87.1 °F | 4.29 in. |
| August | 68.0 °F | 85.8 °F | 4.1 in. |
| September | 61.1 °F | 79.3 °F | 4.46 in. |
| October | 49.5 °F | 67.9 °F | 3.86 in. |
| November | 39.1 °F | 56.2 °F | 3.06 in. |
| December | 31.9 °F | 46.8 °F | 3.74 in. |
| Annual | 47.9 °F | 65.4 °F | 45.69 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 7a : 0°F to 5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |