Bessemer, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.3 °F (low) to 60.1 °F (high). Annual precipitation averages 41.4 Inches. Bessemer is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.0 °F | 34.6 °F | 3.02 in. |
| February | 18.9 °F | 37.7 °F | 2.35 in. |
| March | 26.7 °F | 47.0 °F | 3.07 in. |
| April | 37.2 °F | 60.2 °F | 3.75 in. |
| May | 47.2 °F | 70.6 °F | 3.87 in. |
| June | 56.2 °F | 79.0 °F | 4.37 in. |
| July | 60.0 °F | 82.8 °F | 4.46 in. |
| August | 58.5 °F | 81.6 °F | 3.6 in. |
| September | 51.5 °F | 75.1 °F | 3.79 in. |
| October | 40.7 °F | 62.7 °F | 3.17 in. |
| November | 31.8 °F | 50.2 °F | 2.9 in. |
| December | 24.3 °F | 39.5 °F | 3.05 in. |
| Annual | 39.3 °F | 60.1 °F | 41.4 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |