Belleville, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.5 °F (low) to 55.3 °F (high). Annual precipitation averages 47.2 Inches. Belleville is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.7 °F | 29.7 °F | 4.41 in. |
| February | 13.5 °F | 31.4 °F | 3.33 in. |
| March | 22.0 °F | 39.6 °F | 3.17 in. |
| April | 33.8 °F | 53.3 °F | 3.63 in. |
| May | 45.5 °F | 66.1 °F | 3.61 in. |
| June | 54.9 °F | 74.6 °F | 3.7 in. |
| July | 60.8 °F | 79.0 °F | 3.51 in. |
| August | 59.7 °F | 78.0 °F | 3.8 in. |
| September | 52.2 °F | 71.3 °F | 4.04 in. |
| October | 41.9 °F | 58.6 °F | 5.06 in. |
| November | 31.5 °F | 46.5 °F | 4.36 in. |
| December | 21.2 °F | 35.3 °F | 4.53 in. |
| Annual | 37.5 °F | 55.3 °F | 47.15 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |