Lac Brome, Quebec climate data is summarized below. Average annual temperatures range from 1.7 °C (low) to 11.5 °C (high). Annual precipitation averages 414 Millimeters. Lac Brome is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.03 °C | -3.8 °C | 5 mm |
| February | -12.8 °C | -3.63 °C | 0 mm |
| March | -7.27 °C | 2.35 °C | 11 mm |
| April | 0.68 °C | 11.3 °C | 38 mm |
| May | 7.31 °C | 18.88 °C | 54 mm |
| June | 12.34 °C | 23.09 °C | 65 mm |
| July | 15.02 °C | 25.77 °C | 76 mm |
| August | 14.21 °C | 24.77 °C | 56 mm |
| September | 9.68 °C | 20.47 °C | 34 mm |
| October | 4.36 °C | 13.34 °C | 40 mm |
| November | -1.45 °C | 6.45 °C | 26 mm |
| December | -8.28 °C | -0.9 °C | 9 mm |
| Annual | 1.7 °C | 11.5 °C | 414 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |