Port-Cartier, Quebec climate data is summarized below. Average annual temperatures range from 29.4 °F (low) to 42.7 °F (high). Annual precipitation averages 32 Inches. Port-Cartier is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -27.3 °F | -22.4 °F | 0 in. |
| February | -27 °F | -21.6 °F | 0 in. |
| March | -25.1 °F | -19.4 °F | 0 in. |
| April | -20.1 °F | -16.5 °F | 1397 in. |
| May | -16.3 °F | -12.5 °F | 2768.6 in. |
| June | -12.7 °F | -8.8 °F | 2235.2 in. |
| July | -10.7 °F | -6.9 °F | 2667 in. |
| August | -10.7 °F | -6.9 °F | 2489.2 in. |
| September | -13.4 °F | -9.3 °F | 2870.2 in. |
| October | -16.1 °F | -12.8 °F | 3225.8 in. |
| November | -19.5 °F | -16.4 °F | 2362.2 in. |
| December | -24.3 °F | -20.3 °F | 609.6 in. |
| Annual | 29.4 °F | 42.7 °F | 31.96 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |