Conyngham, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.8 °C (low) to 15.6 °C (high). Annual precipitation averages 1186.9 Millimeters. Conyngham 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8 °C | 1.8 °C | 85.34 mm |
| February | -7.3 °C | 3.3 °C | 65.02 mm |
| March | -3.2 °C | 8.1 °C | 87.63 mm |
| April | 2.6 °C | 15.6 °C | 98.04 mm |
| May | 8.1 °C | 21.6 °C | 102.11 mm |
| June | 13.1 °C | 25.8 °C | 125.73 mm |
| July | 15.6 °C | 28.4 °C | 103.38 mm |
| August | 14.6 °C | 27.4 °C | 103.12 mm |
| September | 10.7 °C | 23.7 °C | 119.89 mm |
| October | 4.6 °C | 17.1 °C | 117.35 mm |
| November | -0.5 °C | 10.2 °C | 84.84 mm |
| December | -4.7 °C | 4.4 °C | 94.49 mm |
| Annual | 3.8 °C | 15.6 °C | 1186.94 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |