Iroquois Falls, Ontario climate data is summarized below. Average annual temperatures range from -3.5 °C (low) to 7.6 °C (high). Annual precipitation averages 684 Millimeters. 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 | -21.55 °C | -10.55 °C | 0 mm |
| February | -21.9 °C | -9.59 °C | 0 mm |
| March | -14.45 °C | -1.78 °C | 0 mm |
| April | -5.49 °C | 5.82 °C | 36 mm |
| May | 3.08 °C | 16.39 °C | 93 mm |
| June | 9.09 °C | 22.45 °C | 91 mm |
| July | 12.32 °C | 23.99 °C | 114 mm |
| August | 11.58 °C | 23.06 °C | 122 mm |
| September | 6.58 °C | 17.78 °C | 113 mm |
| October | 0.85 °C | 9.39 °C | 89 mm |
| November | -5.79 °C | 1.63 °C | 26 mm |
| December | -16.16 °C | -7.33 °C | 0 mm |
| Annual | -3.5 °C | 7.6 °C | 684 mm |
| 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 : -42.8°C to -40°C |
| Current Drought Conditions | Normal |