Mercier, Quebec climate data is summarized below. Average annual temperatures range from 37.3 °F (low) to 53.4 °F (high). Annual precipitation averages 21.4 Inches. Mercier 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 | 25.4 in. |
| February | -24.4 °F | -19.9 °F | 50.8 in. |
| March | -21 °F | -16 °F | 635 in. |
| April | -16.6 °F | -11.2 °F | 1574.8 in. |
| May | -12.9 °F | -6.9 °F | 1346.2 in. |
| June | -10 °F | -4.6 °F | 1727.2 in. |
| July | -8.5 °F | -3.1 °F | 2489.2 in. |
| August | -9 °F | -3.5 °F | 1828.8 in. |
| September | -11.7 °F | -6 °F | 1117.6 in. |
| October | -14.7 °F | -10.2 °F | 1676.4 in. |
| November | -18.1 °F | -14.1 °F | 990.6 in. |
| December | -21.9 °F | -18.4 °F | 355.6 in. |
| Annual | 37.3 °F | 53.4 °F | 21.42 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 |