Eastmain, Quebec climate data is summarized below. Average annual temperatures range from 20.6 °F (low) to 40.4 °F (high). Annual precipitation averages 29.7 Inches. Eastmain is located in USDA Plant Hardiness Zone 1b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -32.3 °F | -25.9 °F | 0 in. |
| February | -32.5 °F | -25.2 °F | 0 in. |
| March | -29.6 °F | -21.3 °F | 0 in. |
| April | -23.5 °F | -17 °F | 457.2 in. |
| May | -17.8 °F | -10.9 °F | 2006.6 in. |
| June | -14.1 °F | -6.5 °F | 2032 in. |
| July | -12.5 °F | -5.9 °F | 4267.2 in. |
| August | -12.3 °F | -6.3 °F | 4140.2 in. |
| September | -14.4 °F | -9.2 °F | 2971.8 in. |
| October | -17 °F | -13.2 °F | 2819.4 in. |
| November | -21 °F | -17.7 °F | 457.2 in. |
| December | -28.6 °F | -23.2 °F | 0 in. |
| Annual | 20.6 °F | 40.4 °F | 29.69 in. |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 1b : -55°F to -50°F |
| Current Drought Conditions | Normal |