Sykesville, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.5 °F (low) to 58.6 °F (high). Annual precipitation averages 43.7 Inches. Sykesville is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.1 °F | 33.5 °F | 3.13 in. |
| February | 17.9 °F | 36.4 °F | 2.39 in. |
| March | 24.7 °F | 45.3 °F | 3.21 in. |
| April | 34.9 °F | 59.4 °F | 3.64 in. |
| May | 45.1 °F | 69.9 °F | 3.84 in. |
| June | 54.0 °F | 77.0 °F | 4.44 in. |
| July | 58.0 °F | 80.8 °F | 4.76 in. |
| August | 56.5 °F | 79.8 °F | 3.97 in. |
| September | 49.7 °F | 73.1 °F | 4.03 in. |
| October | 38.8 °F | 61.2 °F | 3.39 in. |
| November | 29.8 °F | 48.5 °F | 3.37 in. |
| December | 23.0 °F | 37.8 °F | 3.5 in. |
| Annual | 37.5 °F | 58.6 °F | 43.67 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |