Iroquois Falls, Ontario climate data is summarized below. Average annual temperatures range from 25.7 °F (low) to 45.7 °F (high). Annual precipitation averages 26.9 Inches. Iroquois Falls is located in USDA Plant Hardiness Zone 2b. 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 | -29.8 °F | -23.6 °F | 0 in. |
| February | -29.9 °F | -23.1 °F | 0 in. |
| March | -25.8 °F | -18.8 °F | 0 in. |
| April | -20.8 °F | -14.5 °F | 914.4 in. |
| May | -16.1 °F | -8.7 °F | 2362.2 in. |
| June | -12.7 °F | -5.3 °F | 2311.4 in. |
| July | -10.9 °F | -4.5 °F | 2895.6 in. |
| August | -11.3 °F | -5 °F | 3098.8 in. |
| September | -14.1 °F | -7.9 °F | 2870.2 in. |
| October | -17.3 °F | -12.6 °F | 2260.6 in. |
| November | -21 °F | -16.9 °F | 660.4 in. |
| December | -26.8 °F | -21.9 °F | 0 in. |
| Annual | 25.7 °F | 45.7 °F | 26.92 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 2b : -45°F to -40°F |
| Current Drought Conditions | Normal |