Kerrtown, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.4 °F (low) to 58.5 °F (high). Annual precipitation averages 47.5 Inches. Kerrtown 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 | 17.3 °F | 33.3 °F | 3.72 in. |
| February | 17.4 °F | 35.8 °F | 2.62 in. |
| March | 24.9 °F | 44.7 °F | 3.34 in. |
| April | 35.5 °F | 58.3 °F | 3.87 in. |
| May | 46.1 °F | 69.5 °F | 4.04 in. |
| June | 55.1 °F | 77.3 °F | 4.94 in. |
| July | 59.2 °F | 81.3 °F | 4.88 in. |
| August | 57.6 °F | 80.0 °F | 4.11 in. |
| September | 51.2 °F | 73.5 °F | 4.39 in. |
| October | 40.9 °F | 61.5 °F | 4.21 in. |
| November | 32.0 °F | 48.9 °F | 3.57 in. |
| December | 23.9 °F | 38.1 °F | 3.79 in. |
| Annual | 38.4 °F | 58.5 °F | 47.48 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 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |