Laceyville, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.9 °C (low) to 14.8 °C (high). Annual precipitation averages 1025.4 Millimeters. Laceyville is located in USDA Plant Hardiness Zone 6a. 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 | -9.1 °C | 0.8 °C | 65.79 mm |
| February | -8.7 °C | 2.2 °C | 52.07 mm |
| March | -4.4 °C | 6.9 °C | 77.72 mm |
| April | 1.3 °C | 14.4 °C | 91.69 mm |
| May | 7.2 °C | 20.9 °C | 88.39 mm |
| June | 12.4 °C | 25.4 °C | 103.89 mm |
| July | 14.7 °C | 27.8 °C | 102.87 mm |
| August | 13.9 °C | 27 °C | 101.35 mm |
| September | 10 °C | 23.1 °C | 98.55 mm |
| October | 3.8 °C | 16.3 °C | 96.77 mm |
| November | -1.1 °C | 9.6 °C | 72.39 mm |
| December | -5.4 °C | 3.7 °C | 73.91 mm |
| Annual | 2.9 °C | 14.8 °C | 1025.39 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |