Matheson Island, Manitoba climate data is summarized below. Average annual temperatures range from -2.9 °C (low) to 4.3 °C (high). Annual precipitation averages 543 Millimeters. 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 | -22.84 °C | -13.5 °C | 0 mm |
| February | -22.59 °C | -11.95 °C | 0 mm |
| March | -14.68 °C | -3.58 °C | 0 mm |
| April | -5.58 °C | 3.72 °C | 28 mm |
| May | 1.77 °C | 9.31 °C | 87 mm |
| June | 9.38 °C | 15.28 °C | 102 mm |
| July | 13.11 °C | 18.38 °C | 82 mm |
| August | 14.45 °C | 19.5 °C | 130 mm |
| September | 10.95 °C | 16.24 °C | 55 mm |
| October | 4.96 °C | 9.29 °C | 59 mm |
| November | -4.57 °C | 0.04 °C | 0 mm |
| December | -19.06 °C | -11.4 °C | 0 mm |
| Annual | -2.9 °C | 4.3 °C | 543 mm |
| 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°C to -37.2°C |
| Current Drought Conditions | Normal |