Lavelle, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.2 °C (low) to 14.8 °C (high). Annual precipitation averages 1239.3 Millimeters. Lavelle is located in USDA Plant Hardiness Zone 6b. 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 | -8 °C | 1.1 °C | 89.41 mm |
| February | -7.3 °C | 2.6 °C | 67.82 mm |
| March | -3.1 °C | 7.4 °C | 97.79 mm |
| April | 3 °C | 14.6 °C | 101.6 mm |
| May | 8.7 °C | 20.3 °C | 106.17 mm |
| June | 13.6 °C | 24.7 °C | 117.09 mm |
| July | 16.1 °C | 27.7 °C | 117.6 mm |
| August | 15.1 °C | 26.7 °C | 108.2 mm |
| September | 11.3 °C | 22.8 °C | 129.79 mm |
| October | 5.3 °C | 16.1 °C | 116.84 mm |
| November | -0.1 °C | 9.5 °C | 90.93 mm |
| December | -4.6 °C | 3.7 °C | 96.01 mm |
| Annual | 4.2 °C | 14.8 °C | 1239.25 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |