Cartier, Ontario climate data is summarized below. Average annual temperatures range from -2 °C (low) to 8.6 °C (high). Annual precipitation averages 560 Millimeters. Cartier is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -17.91 °C | -7.72 °C | 0 mm |
| February | -18.33 °C | -7.14 °C | 0 mm |
| March | -11.37 °C | -0.06 °C | 3 mm |
| April | -3.22 °C | 7.57 °C | 51 mm |
| May | 4.3 °C | 16.91 °C | 68 mm |
| June | 9.64 °C | 21.68 °C | 65 mm |
| July | 11.59 °C | 23.68 °C | 74 mm |
| August | 11.09 °C | 22.45 °C | 82 mm |
| September | 6.5 °C | 17.79 °C | 78 mm |
| October | 1.15 °C | 10.05 °C | 96 mm |
| November | -5.08 °C | 2.84 °C | 43 mm |
| December | -12.88 °C | -4.7 °C | 0 mm |
| Annual | -2 °C | 8.6 °C | 560 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |