Bethel Park, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.4 °F (low) to 61 °F (high). Annual precipitation averages 42.3 Inches. 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 | 21.1 °F | 36.3 °F | 3.23 in. |
| February | 22.6 °F | 39.1 °F | 2.61 in. |
| March | 29.7 °F | 48.4 °F | 3.38 in. |
| April | 40.4 °F | 61.8 °F | 3.42 in. |
| May | 50.8 °F | 71.4 °F | 4.22 in. |
| June | 59.3 °F | 79.2 °F | 4.38 in. |
| July | 63.4 °F | 83.1 °F | 4.56 in. |
| August | 61.8 °F | 81.8 °F | 3.56 in. |
| September | 55.0 °F | 75.4 °F | 3.55 in. |
| October | 43.6 °F | 63.2 °F | 3.04 in. |
| November | 34.0 °F | 51.2 °F | 3.07 in. |
| December | 26.5 °F | 40.7 °F | 3.23 in. |
| Annual | 42.4 °F | 61 °F | 42.25 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |