Slabtown, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40 °F (low) to 60.6 °F (high). Annual precipitation averages 46.8 Inches. Slabtown 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 | 35.5 °F | 3.37 in. |
| February | 20.1 °F | 38.4 °F | 2.55 in. |
| March | 27.6 °F | 47.2 °F | 3.56 in. |
| April | 37.9 °F | 60.6 °F | 4.05 in. |
| May | 47.8 °F | 71.1 °F | 4.07 in. |
| June | 56.9 °F | 79.0 °F | 4.61 in. |
| July | 61.1 °F | 83.7 °F | 4.41 in. |
| August | 59.4 °F | 81.9 °F | 4.07 in. |
| September | 52.3 °F | 75.2 °F | 4.86 in. |
| October | 41.4 °F | 63.0 °F | 4.3 in. |
| November | 32.2 °F | 50.8 °F | 3.42 in. |
| December | 24.7 °F | 40.2 °F | 3.54 in. |
| Annual | 40 °F | 60.6 °F | 46.81 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 6a : -10°F to -5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |