Moosonee, Ontario climate data is summarized below. Average annual temperatures range from -5 °C (low) to 5.8 °C (high). Annual precipitation averages 558 Millimeters. Moosonee is located in USDA Plant Hardiness Zone 1b. The growing season typically runs from the last frost around Jun. 11 - Jun. 20 through the first frost around Aug. 11 - Aug. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -23.79 °C | -13.34 °C | 0 mm |
| February | -24.31 °C | -12.54 °C | 0 mm |
| March | -18.39 °C | -5 °C | 0 mm |
| April | -7.84 °C | 3.16 °C | 10 mm |
| May | 0.66 °C | 13.11 °C | 67 mm |
| June | 7.23 °C | 21.09 °C | 73 mm |
| July | 11.88 °C | 23.49 °C | 116 mm |
| August | 11.24 °C | 22.21 °C | 99 mm |
| September | 6.62 °C | 16.88 °C | 84 mm |
| October | 1.24 °C | 8.97 °C | 79 mm |
| November | -6.3 °C | 0.75 °C | 30 mm |
| December | -18.52 °C | -9.43 °C | 0 mm |
| Annual | -5 °C | 5.8 °C | 558 mm |
| Average First Frost Date | Aug. 11 - Aug. 20 |
| Average Last Frost Date | Jun. 11 - Jun. 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 1b : |
| Current Drought Conditions | Normal |