Cowansville, Quebec climate data is summarized below. Average annual temperatures range from 2.2 °C (low) to 12 °C (high). Annual precipitation averages 433 Millimeters. Cowansville 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 | -12.46 °C | -3.55 °C | 9 mm |
| February | -12.21 °C | -3.33 °C | 6 mm |
| March | -6.42 °C | 3.13 °C | 22 mm |
| April | 1.27 °C | 11.99 °C | 50 mm |
| May | 7.86 °C | 19.51 °C | 51 mm |
| June | 12.86 °C | 23.68 °C | 55 mm |
| July | 15.46 °C | 26.38 °C | 69 mm |
| August | 14.57 °C | 25.42 °C | 52 mm |
| September | 9.97 °C | 20.94 °C | 31 mm |
| October | 4.63 °C | 13.68 °C | 40 mm |
| November | -1.03 °C | 6.86 °C | 31 mm |
| December | -7.84 °C | -0.63 °C | 17 mm |
| Annual | 2.2 °C | 12 °C | 433 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |