Lac-Mégantic, Quebec climate data is summarized below. Average annual temperatures range from 31 °F (low) to 48.6 °F (high). Annual precipitation averages 9.8 Inches. Lac-Mégantic is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -26.2 °F | -20.9 °F | 0 in. |
| February | -26 °F | -20.8 °F | 0 in. |
| March | -23.3 °F | -17.9 °F | 0 in. |
| April | -19.3 °F | -13.8 °F | 254 in. |
| May | -14.9 °F | -8.7 °F | 685.8 in. |
| June | -12.2 °F | -6.2 °F | 1092.2 in. |
| July | -10.6 °F | -4.6 °F | 1625.6 in. |
| August | -11.1 °F | -5.2 °F | 1193.8 in. |
| September | -13.5 °F | -7.5 °F | 660.4 in. |
| October | -16.3 °F | -11.5 °F | 558.8 in. |
| November | -19.6 °F | -15.4 °F | 254 in. |
| December | -23.8 °F | -19.4 °F | 0 in. |
| Annual | 31 °F | 48.6 °F | 9.79 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |