Belleville, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.7 °C (low) to 16 °C (high). Annual precipitation averages 1062.5 Millimeters. Belleville is located in USDA Plant Hardiness Zone 7a. 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 | -6.8 °C | 2.1 °C | 74.42 mm |
| February | -6.2 °C | 3.9 °C | 59.44 mm |
| March | -2.4 °C | 8.8 °C | 85.6 mm |
| April | 3.3 °C | 16.2 °C | 91.19 mm |
| May | 9.1 °C | 21.8 °C | 101.6 mm |
| June | 14.2 °C | 26.3 °C | 99.57 mm |
| July | 16.4 °C | 28.7 °C | 94.23 mm |
| August | 15.6 °C | 27.8 °C | 94.49 mm |
| September | 11.6 °C | 23.9 °C | 107.44 mm |
| October | 5.4 °C | 17.3 °C | 93.73 mm |
| November | 0.2 °C | 10.7 °C | 77.72 mm |
| December | -3.8 °C | 4.5 °C | 83.06 mm |
| Annual | 4.7 °C | 16 °C | 1062.49 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 7a : -17.8°C to -15°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 |