L'Ancienne-Lorette, Quebec climate data is summarized below. Average annual temperatures range from 33.9 °F (low) to 50.3 °F (high). Annual precipitation averages 37.1 Inches. 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 | -26 °F | -21.1 °F | 0 in. |
| February | -25.6 °F | -20.5 °F | 0 in. |
| March | -22.6 °F | -17.4 °F | 457.2 in. |
| April | -17.9 °F | -12.6 °F | 1879.6 in. |
| May | -14 °F | -7.9 °F | 2413 in. |
| June | -11.1 °F | -5.3 °F | 3200.4 in. |
| July | -9.4 °F | -3.8 °F | 4089.4 in. |
| August | -9.8 °F | -4.3 °F | 3479.8 in. |
| September | -12.5 °F | -7 °F | 2870.2 in. |
| October | -15.6 °F | -11.2 °F | 3124.2 in. |
| November | -18.8 °F | -15 °F | 1905 in. |
| December | -23.3 °F | -19.5 °F | 533.4 in. |
| Annual | 33.9 °F | 50.3 °F | 37.12 in. |
| 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 : -20°F to -15°F |
| Current Drought Conditions | Normal |