Adamsville, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.8 °C (low) to 15.1 °C (high). Annual precipitation averages 1131.3 Millimeters. Adamsville is located in USDA Plant Hardiness Zone 6a. 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 | -7.9 °C | 1.1 °C | 81.79 mm |
| February | -7.8 °C | 2.4 °C | 58.42 mm |
| March | -3.6 °C | 7.4 °C | 77.98 mm |
| April | 2.2 °C | 15.1 °C | 102.36 mm |
| May | 8.2 °C | 21.2 °C | 102.11 mm |
| June | 13.1 °C | 25.6 °C | 121.92 mm |
| July | 15.4 °C | 27.7 °C | 117.35 mm |
| August | 14.4 °C | 26.8 °C | 99.82 mm |
| September | 10.8 °C | 23.4 °C | 108.97 mm |
| October | 5 °C | 16.7 °C | 93.98 mm |
| November | 0.2 °C | 9.7 °C | 82.8 mm |
| December | -4.3 °C | 3.7 °C | 83.82 mm |
| Annual | 3.8 °C | 15.1 °C | 1131.32 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |