Ignace, Ontario climate data is summarized below. Average annual temperatures range from 26.9 °F (low) to 45 °F (high). Annual precipitation averages 23.3 Inches. Ignace is located in USDA Plant Hardiness Zone 3b. 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 | -29.5 °F | -24.2 °F | 0 in. |
| February | -29.3 °F | -23 °F | 0 in. |
| March | -24.1 °F | -18.1 °F | 0 in. |
| April | -19.8 °F | -13.8 °F | 355.6 in. |
| May | -15.8 °F | -9.1 °F | 2463.8 in. |
| June | -12.2 °F | -6 °F | 2997.2 in. |
| July | -10.7 °F | -4.7 °F | 3149.6 in. |
| August | -11.3 °F | -5.1 °F | 2159 in. |
| September | -13.7 °F | -8 °F | 2260.6 in. |
| October | -17 °F | -12.6 °F | 1600.2 in. |
| November | -21.4 °F | -17.7 °F | 25.4 in. |
| December | -27.6 °F | -23.1 °F | 0 in. |
| Annual | 26.9 °F | 45 °F | 23.27 in. |
| 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 3b : -35°F to -30°F |
| Current Drought Conditions | Normal |