Deux-Montagnes, Quebec climate data is summarized below. Average annual temperatures range from 2.9 °C (low) to 11.6 °C (high). Annual precipitation averages 815 Millimeters. Deux-Montagnes is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.75 °C | -4.85 °C | 9 mm |
| February | -12.46 °C | -4.29 °C | 10 mm |
| March | -6.32 °C | 2.31 °C | 39 mm |
| April | 2.07 °C | 11.54 °C | 90 mm |
| May | 9.07 °C | 19.52 °C | 79 mm |
| June | 14.25 °C | 23.97 °C | 107 mm |
| July | 16.96 °C | 26.47 °C | 133 mm |
| August | 16.21 °C | 25.62 °C | 94 mm |
| September | 11.43 °C | 21.16 °C | 68 mm |
| October | 5.57 °C | 13.47 °C | 101 mm |
| November | -0.65 °C | 6.3 °C | 59 mm |
| December | -8.16 °C | -1.77 °C | 26 mm |
| Annual | 2.9 °C | 11.6 °C | 815 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |