Buffington, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.5 °C (low) to 17.2 °C (high). Annual precipitation averages 1118.6 Millimeters. Buffington is located in USDA Plant Hardiness Zone 6b. 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 | -5.8 °C | 3.8 °C | 83.57 mm |
| February | -5 °C | 5.5 °C | 72.64 mm |
| March | -1.3 °C | 10.6 °C | 91.95 mm |
| April | 4.2 °C | 17.7 °C | 93.98 mm |
| May | 9.9 °C | 22.8 °C | 111 mm |
| June | 14.7 °C | 26.9 °C | 115.57 mm |
| July | 17 °C | 28.9 °C | 117.09 mm |
| August | 16.2 °C | 28.4 °C | 96.77 mm |
| September | 12.3 °C | 25 °C | 90.17 mm |
| October | 5.9 °C | 18.4 °C | 79.25 mm |
| November | 0.7 °C | 11.8 °C | 81.28 mm |
| December | -3 °C | 6.1 °C | 85.34 mm |
| Annual | 5.5 °C | 17.2 °C | 1118.61 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |