Keedysville, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.3 °F (low) to 65.5 °F (high). Annual precipitation averages 41.9 Inches. Keedysville 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 | 23.0 °F | 41.6 °F | 3.0 in. |
| February | 24.5 °F | 45.1 °F | 2.4 in. |
| March | 30.8 °F | 53.6 °F | 3.57 in. |
| April | 41.5 °F | 66.1 °F | 3.58 in. |
| May | 51.4 °F | 74.8 °F | 4.31 in. |
| June | 59.9 °F | 83.3 °F | 3.82 in. |
| July | 64.4 °F | 87.7 °F | 3.82 in. |
| August | 62.8 °F | 86.0 °F | 3.36 in. |
| September | 55.9 °F | 79.3 °F | 4.16 in. |
| October | 43.5 °F | 67.7 °F | 3.48 in. |
| November | 34.0 °F | 56.0 °F | 3.07 in. |
| December | 27.4 °F | 45.3 °F | 3.33 in. |
| Annual | 43.3 °F | 65.5 °F | 41.9 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 |