Rosemère, Quebec climate data is summarized below. Average annual temperatures range from 2.5 °C (low) to 11.5 °C (high). Annual precipitation averages 866 Millimeters. Rosemère 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 | -13.32 °C | -5.07 °C | 7 mm |
| February | -12.91 °C | -4.35 °C | 11 mm |
| March | -6.78 °C | 2.44 °C | 40 mm |
| April | 1.56 °C | 11.32 °C | 91 mm |
| May | 8.79 °C | 19.5 °C | 89 mm |
| June | 13.98 °C | 23.93 °C | 114 mm |
| July | 16.7 °C | 26.42 °C | 137 mm |
| August | 15.94 °C | 25.55 °C | 106 mm |
| September | 11.11 °C | 21.07 °C | 74 mm |
| October | 5.22 °C | 13.34 °C | 105 mm |
| November | -0.96 °C | 6.08 °C | 63 mm |
| December | -8.75 °C | -2.04 °C | 29 mm |
| Annual | 2.5 °C | 11.5 °C | 866 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 |