Cearfoss, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.6 °F (low) to 64.6 °F (high). Annual precipitation averages 40.2 Inches. Cearfoss 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 | 23.3 °F | 40.5 °F | 2.97 in. |
| February | 24.5 °F | 44.0 °F | 2.27 in. |
| March | 31.5 °F | 52.6 °F | 3.47 in. |
| April | 41.7 °F | 65.0 °F | 3.63 in. |
| May | 51.4 °F | 74.0 °F | 3.83 in. |
| June | 60.2 °F | 82.8 °F | 3.66 in. |
| July | 64.7 °F | 87.2 °F | 3.43 in. |
| August | 62.9 °F | 85.4 °F | 3.31 in. |
| September | 55.9 °F | 78.6 °F | 3.83 in. |
| October | 44.5 °F | 66.7 °F | 3.58 in. |
| November | 34.7 °F | 54.9 °F | 2.92 in. |
| December | 27.4 °F | 44.0 °F | 3.3 in. |
| Annual | 43.6 °F | 64.6 °F | 40.2 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 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |