Moosonee, Ontario climate data is summarized below. Average annual temperatures range from 23 °F (low) to 42.4 °F (high). Annual precipitation averages 22 Inches. 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 | -31 °F | -25.2 °F | 0 in. |
| February | -31.3 °F | -24.7 °F | 0 in. |
| March | -28 °F | -20.6 °F | 0 in. |
| April | -22.1 °F | -16 °F | 254 in. |
| May | -17.4 °F | -10.5 °F | 1701.8 in. |
| June | -13.8 °F | -6.1 °F | 1854.2 in. |
| July | -11.2 °F | -4.7 °F | 2946.4 in. |
| August | -11.5 °F | -5.4 °F | 2514.6 in. |
| September | -14.1 °F | -8.4 °F | 2133.6 in. |
| October | -17.1 °F | -12.8 °F | 2006.6 in. |
| November | -21.3 °F | -17.4 °F | 762 in. |
| December | -28.1 °F | -23 °F | 0 in. |
| Annual | 23 °F | 42.4 °F | 21.97 in. |
| 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 : -55°F to -50°F |
| Current Drought Conditions | Normal |