L'Ancienne-Lorette, Quebec climate data is summarized below. Average annual temperatures range from 1 °C (low) to 10.2 °C (high). Annual precipitation averages 943 Millimeters. L'Ancienne-Lorette is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.83 °C | -6.01 °C | 0 mm |
| February | -14.07 °C | -4.96 °C | 0 mm |
| March | -8.59 °C | 0.71 °C | 18 mm |
| April | -0.21 °C | 9.37 °C | 74 mm |
| May | 6.73 °C | 17.77 °C | 95 mm |
| June | 12.02 °C | 22.51 °C | 126 mm |
| July | 15.12 °C | 25.25 °C | 161 mm |
| August | 14.42 °C | 24.29 °C | 137 mm |
| September | 9.48 °C | 19.48 °C | 113 mm |
| October | 4 °C | 11.85 °C | 123 mm |
| November | -1.79 °C | 4.92 °C | 75 mm |
| December | -9.91 °C | -3.15 °C | 21 mm |
| Annual | 1 °C | 10.2 °C | 943 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |