Inkerman, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40.3 °F (low) to 60.3 °F (high). Annual precipitation averages 42.5 Inches. Inkerman is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.7 °F | 34.9 °F | 2.69 in. |
| February | 19.8 °F | 37.8 °F | 2.37 in. |
| March | 27.3 °F | 46.4 °F | 2.78 in. |
| April | 37.9 °F | 59.8 °F | 3.61 in. |
| May | 48.5 °F | 71.2 °F | 3.46 in. |
| June | 57.3 °F | 79.1 °F | 4.55 in. |
| July | 61.7 °F | 83.9 °F | 4.41 in. |
| August | 60.0 °F | 81.9 °F | 3.95 in. |
| September | 52.9 °F | 75.0 °F | 4.39 in. |
| October | 41.9 °F | 62.6 °F | 4.23 in. |
| November | 32.7 °F | 50.9 °F | 2.9 in. |
| December | 25.0 °F | 40.2 °F | 3.14 in. |
| Annual | 40.3 °F | 60.3 °F | 42.48 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |