Belleville, Ontario climate data is summarized below. Average annual temperatures range from 2.8 °C (low) to 13.4 °C (high). Annual precipitation averages 713 Millimeters. Belleville is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.75 °C | -1.77 °C | 13 mm |
| February | -11.8 °C | -1.82 °C | 7 mm |
| March | -5.43 °C | 5.08 °C | 40 mm |
| April | 1.7 °C | 13.14 °C | 68 mm |
| May | 8.11 °C | 20.71 °C | 84 mm |
| June | 13.46 °C | 25.05 °C | 93 mm |
| July | 15.82 °C | 27.48 °C | 115 mm |
| August | 14.96 °C | 26.51 °C | 98 mm |
| September | 10.11 °C | 22.19 °C | 63 mm |
| October | 4.98 °C | 15.03 °C | 60 mm |
| November | -1.04 °C | 8.17 °C | 40 mm |
| December | -6.59 °C | 1.06 °C | 32 mm |
| Annual | 2.8 °C | 13.4 °C | 713 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |