Saint-Eustache, Quebec climate data is summarized below. Average annual temperatures range from 37 °F (low) to 52.9 °F (high). Annual precipitation averages 33 Inches. Saint-Eustache 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 | -25 °F | -20.5 °F | 228.6 in. |
| February | -24.8 °F | -20.2 °F | 279.4 in. |
| March | -21.4 °F | -16.4 °F | 1016 in. |
| April | -16.7 °F | -11.4 °F | 2286 in. |
| May | -12.8 °F | -6.9 °F | 2108.2 in. |
| June | -9.9 °F | -4.5 °F | 2819.4 in. |
| July | -8.4 °F | -3.1 °F | 3606.8 in. |
| August | -8.8 °F | -3.5 °F | 2413 in. |
| September | -11.5 °F | -6 °F | 1778 in. |
| October | -14.8 °F | -10.3 °F | 2616.2 in. |
| November | -18.2 °F | -14.3 °F | 1473.2 in. |
| December | -22.4 °F | -18.8 °F | 685.8 in. |
| Annual | 37 °F | 52.9 °F | 33.02 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |