Lac-Mégantic, Quebec climate data is summarized below. Average annual temperatures range from -0.5 °C (low) to 9.2 °C (high). Annual precipitation averages 249 Millimeters. 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 | -15.23 °C | -5.61 °C | 0 mm |
| February | -14.85 °C | -5.37 °C | 0 mm |
| March | -10 °C | -0.15 °C | 0 mm |
| April | -2.7 °C | 7.13 °C | 10 mm |
| May | 5.11 °C | 16.43 °C | 27 mm |
| June | 9.98 °C | 20.76 °C | 43 mm |
| July | 12.95 °C | 23.66 °C | 64 mm |
| August | 12.08 °C | 22.62 °C | 47 mm |
| September | 7.74 °C | 18.55 °C | 26 mm |
| October | 2.63 °C | 11.32 °C | 22 mm |
| November | -3.35 °C | 4.37 °C | 10 mm |
| December | -10.77 °C | -2.94 °C | 0 mm |
| Annual | -0.5 °C | 9.2 °C | 249 mm |
| 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 : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |