Slatedale, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.4 °F (low) to 61.3 °F (high). Annual precipitation averages 51.6 Inches. Slatedale 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 | 19.5 °F | 36.8 °F | 3.62 in. |
| February | 20.6 °F | 39.7 °F | 2.87 in. |
| March | 27.9 °F | 47.9 °F | 3.78 in. |
| April | 38.2 °F | 61.2 °F | 4.12 in. |
| May | 48.3 °F | 71.5 °F | 4.26 in. |
| June | 57.3 °F | 79.5 °F | 5.26 in. |
| July | 62.1 °F | 84.0 °F | 5.09 in. |
| August | 60.3 °F | 82.3 °F | 4.78 in. |
| September | 52.9 °F | 75.5 °F | 5.21 in. |
| October | 41.2 °F | 63.7 °F | 4.74 in. |
| November | 31.8 °F | 51.9 °F | 3.63 in. |
| December | 24.7 °F | 41.3 °F | 4.2 in. |
| Annual | 40.4 °F | 61.3 °F | 51.56 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |