Boissevain, Manitoba climate data is summarized below. Average annual temperatures range from 28.8 °F (low) to 47.9 °F (high). Annual precipitation averages 22.2 Inches. 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 | -28 °F | -22.8 °F | 0 in. |
| February | -27.7 °F | -22.4 °F | 0 in. |
| March | -23 °F | -17.5 °F | 203.2 in. |
| April | -18.7 °F | -12.5 °F | 1016 in. |
| May | -15.2 °F | -8.4 °F | 2489.2 in. |
| June | -11.8 °F | -5.5 °F | 3124.2 in. |
| July | -10.4 °F | -3.9 °F | 2844.8 in. |
| August | -11.1 °F | -4 °F | 2286 in. |
| September | -13.6 °F | -6.6 °F | 1346.2 in. |
| October | -17.1 °F | -11.4 °F | 965.2 in. |
| November | -21.7 °F | -16.9 °F | 50.8 in. |
| December | -27.1 °F | -22.5 °F | 0 in. |
| Annual | 28.8 °F | 47.9 °F | 22.2 in. |
| 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 : -35°F to -30°F |
| Current Drought Conditions | Abnormally Dry |