Boissevain, Manitoba climate data is summarized below. Average annual temperatures range from -1.8 °C (low) to 8.8 °C (high). Annual precipitation averages 564 Millimeters. Boissevain is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -18.44 °C | -8.96 °C | 0 mm |
| February | -17.88 °C | -8.27 °C | 0 mm |
| March | -9.46 °C | 0.54 °C | 8 mm |
| April | -1.59 °C | 9.43 °C | 40 mm |
| May | 4.62 °C | 16.85 °C | 98 mm |
| June | 10.71 °C | 22.05 °C | 123 mm |
| July | 13.3 °C | 25.02 °C | 112 mm |
| August | 12.09 °C | 24.8 °C | 90 mm |
| September | 7.59 °C | 20.04 °C | 53 mm |
| October | 1.17 °C | 11.48 °C | 38 mm |
| November | -7.08 °C | 1.52 °C | 2 mm |
| December | -16.69 °C | -8.46 °C | 0 mm |
| Annual | -1.8 °C | 8.8 °C | 564 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |