Matheson Island, Manitoba climate data is summarized below. Average annual temperatures range from 26.8 °F (low) to 39.7 °F (high). Annual precipitation averages 21.4 Inches. Matheson Island is located in USDA Plant Hardiness Zone 3a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -30.5 °F | -25.3 °F | 0 in. |
| February | -30.3 °F | -24.4 °F | 0 in. |
| March | -25.9 °F | -19.8 °F | 0 in. |
| April | -20.9 °F | -15.7 °F | 711.2 in. |
| May | -16.8 °F | -12.6 °F | 2209.8 in. |
| June | -12.6 °F | -9.3 °F | 2590.8 in. |
| July | -10.5 °F | -7.6 °F | 2082.8 in. |
| August | -9.8 °F | -6.9 °F | 3302 in. |
| September | -11.7 °F | -8.8 °F | 1397 in. |
| October | -15 °F | -12.6 °F | 1498.6 in. |
| November | -20.3 °F | -17.8 °F | 0 in. |
| December | -28.4 °F | -24.1 °F | 0 in. |
| Annual | 26.8 °F | 39.7 °F | 21.39 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3a : -40°F to -35°F |
| Current Drought Conditions | Normal |