Longueuil, Quebec climate data is summarized below. Average annual temperatures range from 38.4 °F (low) to 53.7 °F (high). Annual precipitation averages 37.2 Inches. Longueuil is located in USDA Plant Hardiness Zone 6a. 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 | -24.1 °F | -20 °F | 406.4 in. |
| February | -24 °F | -19.8 °F | 533.4 in. |
| March | -20.7 °F | -16 °F | 1397 in. |
| April | -16.4 °F | -11 °F | 2692.4 in. |
| May | -12.5 °F | -6.8 °F | 2438.4 in. |
| June | -9.7 °F | -4.4 °F | 2717.8 in. |
| July | -8.2 °F | -3 °F | 3429 in. |
| August | -8.6 °F | -3.4 °F | 2794 in. |
| September | -11.2 °F | -5.9 °F | 1828.8 in. |
| October | -14.5 °F | -10.1 °F | 2717.8 in. |
| November | -17.9 °F | -14 °F | 1879.6 in. |
| December | -21.8 °F | -18.5 °F | 1143 in. |
| Annual | 38.4 °F | 53.7 °F | 37.15 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |