Kersey, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.2 °C (low) to 13.1 °C (high). Annual precipitation averages 1164.1 Millimeters. Kersey is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.7 °C | -0.9 °C | 88.14 mm |
| February | -9.3 °C | 0.7 °C | 67.82 mm |
| March | -5.1 °C | 5.4 °C | 87.12 mm |
| April | 0.9 °C | 13.6 °C | 100.84 mm |
| May | 6.7 °C | 19.6 °C | 106.17 mm |
| June | 11.3 °C | 23.3 °C | 113.79 mm |
| July | 13.6 °C | 25.6 °C | 106.93 mm |
| August | 12.9 °C | 24.7 °C | 107.19 mm |
| September | 9.4 °C | 21.1 °C | 104.14 mm |
| October | 3.4 °C | 14.5 °C | 97.03 mm |
| November | -1.4 °C | 7.6 °C | 94.74 mm |
| December | -6.1 °C | 1.5 °C | 90.17 mm |
| Annual | 2.2 °C | 13.1 °C | 1164.08 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |