Vaughan, Ontario climate data is summarized below. Average annual temperatures range from 3.7 °C (low) to 13.3 °C (high). Annual precipitation averages 888 Millimeters. Vaughan is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.08 °C | -1.58 °C | 17 mm |
| February | -10.29 °C | -1.9 °C | 14 mm |
| March | -4.59 °C | 5 °C | 57 mm |
| April | 2.1 °C | 12.71 °C | 89 mm |
| May | 8.37 °C | 20.11 °C | 105 mm |
| June | 13.55 °C | 24.84 °C | 119 mm |
| July | 16.2 °C | 27.46 °C | 110 mm |
| August | 15.57 °C | 26.58 °C | 116 mm |
| September | 11.17 °C | 22.05 °C | 77 mm |
| October | 5.79 °C | 14.61 °C | 77 mm |
| November | -0.03 °C | 7.9 °C | 61 mm |
| December | -5.08 °C | 1.2 °C | 46 mm |
| Annual | 3.7 °C | 13.3 °C | 888 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |