Brossard, Quebec climate data is summarized below. Average annual temperatures range from 3.4 °C (low) to 12.3 °C (high). Annual precipitation averages 935 Millimeters. Brossard 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.68 °C | -3.93 °C | 21 mm |
| February | -11.39 °C | -3.57 °C | 23 mm |
| March | -5.79 °C | 3.17 °C | 61 mm |
| April | 2.21 °C | 12.39 °C | 109 mm |
| May | 9.18 °C | 20.09 °C | 99 mm |
| June | 14.4 °C | 24.6 °C | 102 mm |
| July | 17.1 °C | 27.22 °C | 125 mm |
| August | 16.32 °C | 26.27 °C | 84 mm |
| September | 11.58 °C | 21.71 °C | 71 mm |
| October | 5.8 °C | 14.02 °C | 110 mm |
| November | -0.3 °C | 6.97 °C | 76 mm |
| December | -7.22 °C | -1.03 °C | 54 mm |
| Annual | 3.4 °C | 12.3 °C | 935 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 |