Mont-Saint-Hilaire, Quebec climate data is summarized below. Average annual temperatures range from 37.2 °F (low) to 53.4 °F (high). Annual precipitation averages 37.3 Inches. Mont-Saint-Hilaire is located in USDA Plant Hardiness Zone 5b. 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 | -24.6 °F | -20.1 °F | 558.8 in. |
| February | -24.4 °F | -19.9 °F | 584.2 in. |
| March | -21.1 °F | -16.1 °F | 1346.2 in. |
| April | -16.7 °F | -11.2 °F | 2590.8 in. |
| May | -12.9 °F | -6.9 °F | 2616.2 in. |
| June | -10 °F | -4.5 °F | 2844.8 in. |
| July | -8.5 °F | -3.1 °F | 3225.8 in. |
| August | -9 °F | -3.6 °F | 2463.8 in. |
| September | -11.6 °F | -6 °F | 1905 in. |
| October | -14.9 °F | -10.2 °F | 2844.8 in. |
| November | -18.1 °F | -14.1 °F | 1854.2 in. |
| December | -22.2 °F | -18.6 °F | 1193.8 in. |
| Annual | 37.2 °F | 53.4 °F | 37.26 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 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |