Laval, Quebec climate data is summarized below. Average annual temperatures range from 3 °C (low) to 11.7 °C (high). Annual precipitation averages 870 Millimeters. Laval 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.61 °C | -4.77 °C | 10 mm |
| February | -12.18 °C | -4.1 °C | 14 mm |
| March | -6.1 °C | 2.65 °C | 45 mm |
| April | 1.99 °C | 11.6 °C | 97 mm |
| May | 9.15 °C | 19.65 °C | 91 mm |
| June | 14.3 °C | 24.05 °C | 113 mm |
| July | 17.09 °C | 26.56 °C | 128 mm |
| August | 16.33 °C | 25.73 °C | 90 mm |
| September | 11.47 °C | 21.23 °C | 72 mm |
| October | 5.54 °C | 13.48 °C | 109 mm |
| November | -0.63 °C | 6.28 °C | 68 mm |
| December | -8.16 °C | -1.77 °C | 33 mm |
| Annual | 3 °C | 11.7 °C | 870 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |