Sheffield, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.5 °F (low) to 57.8 °F (high). Annual precipitation averages 46.4 Inches. Sheffield is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.7 °F | 32.0 °F | 3.63 in. |
| February | 15.9 °F | 34.6 °F | 2.46 in. |
| March | 22.9 °F | 43.7 °F | 3.13 in. |
| April | 33.3 °F | 57.8 °F | 4.04 in. |
| May | 43.9 °F | 69.4 °F | 3.9 in. |
| June | 52.7 °F | 77.3 °F | 4.56 in. |
| July | 56.8 °F | 81.3 °F | 4.7 in. |
| August | 55.7 °F | 79.8 °F | 4.1 in. |
| September | 49.3 °F | 73.2 °F | 4.09 in. |
| October | 38.9 °F | 60.5 °F | 3.88 in. |
| November | 30.1 °F | 47.6 °F | 3.9 in. |
| December | 22.8 °F | 36.8 °F | 3.99 in. |
| Annual | 36.5 °F | 57.8 °F | 46.38 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 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 |