Bethel Park, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.7 °C (low) to 16.1 °C (high). Annual precipitation averages 1073.1 Millimeters. Bethel Park 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.1 °C | 2.4 °C | 82.04 mm |
| February | -5.2 °C | 3.9 °C | 66.29 mm |
| March | -1.3 °C | 9.1 °C | 85.85 mm |
| April | 4.7 °C | 16.6 °C | 86.87 mm |
| May | 10.4 °C | 21.9 °C | 107.19 mm |
| June | 15.2 °C | 26.2 °C | 111.25 mm |
| July | 17.4 °C | 28.4 °C | 115.82 mm |
| August | 16.6 °C | 27.7 °C | 90.42 mm |
| September | 12.8 °C | 24.1 °C | 90.17 mm |
| October | 6.4 °C | 17.3 °C | 77.22 mm |
| November | 1.1 °C | 10.7 °C | 77.98 mm |
| December | -3.1 °C | 4.8 °C | 82.04 mm |
| Annual | 5.7 °C | 16.1 °C | 1073.14 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 |