Châteauguay, Quebec climate data is summarized below. Average annual temperatures range from 38 °F (low) to 53.6 °F (high). Annual precipitation averages 27.2 Inches. Châteauguay 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -24.4 °F | -20.1 °F | 203.2 in. |
| February | -24.2 °F | -19.9 °F | 279.4 in. |
| March | -20.8 °F | -16 °F | 1041.4 in. |
| April | -16.4 °F | -11.1 °F | 2082.8 in. |
| May | -12.7 °F | -6.9 °F | 1727.2 in. |
| June | -9.8 °F | -4.5 °F | 1981.2 in. |
| July | -8.3 °F | -3 °F | 2590.8 in. |
| August | -8.7 °F | -3.4 °F | 1981.2 in. |
| September | -11.4 °F | -5.9 °F | 1371.6 in. |
| October | -14.5 °F | -10.1 °F | 2133.6 in. |
| November | -17.9 °F | -14 °F | 1397 in. |
| December | -21.8 °F | -18.4 °F | 736.6 in. |
| Annual | 38 °F | 53.6 °F | 27.17 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |