Pomeroy, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.3 °C (low) to 16.9 °C (high). Annual precipitation averages 1300.5 Millimeters. Pomeroy is located in USDA Plant Hardiness Zone 7a. 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 | -5.2 °C | 3.8 °C | 95.76 mm |
| February | -4.9 °C | 4.9 °C | 77.47 mm |
| March | -0.8 °C | 9.8 °C | 111.51 mm |
| April | 4.9 °C | 16.6 °C | 100.58 mm |
| May | 10.4 °C | 21.9 °C | 102.87 mm |
| June | 15.4 °C | 26.7 °C | 122.43 mm |
| July | 18.3 °C | 29.1 °C | 124.71 mm |
| August | 17.4 °C | 28.4 °C | 115.32 mm |
| September | 13.4 °C | 24.8 °C | 129.03 mm |
| October | 6.9 °C | 18.3 °C | 119.89 mm |
| November | 1.8 °C | 11.8 °C | 89.41 mm |
| December | -2.4 °C | 6.2 °C | 111.51 mm |
| Annual | 6.3 °C | 16.9 °C | 1300.49 mm |
| 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 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |