Niagara Falls, Ontario climate data is summarized below. Average annual temperatures range from 4.7 °C (low) to 13.9 °C (high). Annual precipitation averages 831 Millimeters. Niagara Falls is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.23 °C | -0.46 °C | 25 mm |
| February | -8.56 °C | -1.15 °C | 22 mm |
| March | -3.19 °C | 5.96 °C | 57 mm |
| April | 2.58 °C | 13.29 °C | 82 mm |
| May | 8.71 °C | 20.43 °C | 85 mm |
| June | 14.16 °C | 24.94 °C | 93 mm |
| July | 16.95 °C | 27.25 °C | 81 mm |
| August | 16.39 °C | 26.67 °C | 71 mm |
| September | 12.15 °C | 22.34 °C | 92 mm |
| October | 6.86 °C | 15.43 °C | 96 mm |
| November | 1.12 °C | 8.93 °C | 70 mm |
| December | -3.35 °C | 2.69 °C | 57 mm |
| Annual | 4.7 °C | 13.9 °C | 831 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |