Belle River, Ontario climate data is summarized below. Average annual temperatures range from 6.6 °C (low) to 13.3 °C (high). Annual precipitation averages 576 Millimeters. Belle River is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.05 °C | -0.94 °C | 18 mm |
| February | -7.86 °C | -1.24 °C | 10 mm |
| March | -1.71 °C | 5.75 °C | 40 mm |
| April | 4.29 °C | 12.27 °C | 59 mm |
| May | 10.79 °C | 18.84 °C | 70 mm |
| June | 16.7 °C | 23.99 °C | 72 mm |
| July | 19.55 °C | 26.55 °C | 63 mm |
| August | 19.25 °C | 25.91 °C | 60 mm |
| September | 15.21 °C | 22.11 °C | 64 mm |
| October | 9.43 °C | 15.73 °C | 43 mm |
| November | 2.98 °C | 8.7 °C | 44 mm |
| December | -2.4 °C | 2.33 °C | 33 mm |
| Annual | 6.6 °C | 13.3 °C | 576 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |