Chewsville, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.9 °F (low) to 64.3 °F (high). Annual precipitation averages 41.1 Inches. Chewsville 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 | 23.8 °F | 40.2 °F | 3.02 in. |
| February | 24.9 °F | 43.7 °F | 2.28 in. |
| March | 32.0 °F | 52.3 °F | 3.39 in. |
| April | 42.0 °F | 64.6 °F | 3.55 in. |
| May | 51.6 °F | 73.6 °F | 4.16 in. |
| June | 60.5 °F | 82.3 °F | 3.64 in. |
| July | 64.8 °F | 86.5 °F | 3.72 in. |
| August | 63.2 °F | 84.9 °F | 3.51 in. |
| September | 56.2 °F | 78.0 °F | 4.06 in. |
| October | 45.2 °F | 66.4 °F | 3.56 in. |
| November | 35.1 °F | 54.6 °F | 2.86 in. |
| December | 27.9 °F | 43.9 °F | 3.3 in. |
| Annual | 43.9 °F | 64.3 °F | 41.05 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 | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |