Aurora, Ontario climate data is summarized below. Average annual temperatures range from 3 °C (low) to 12.3 °C (high). Annual precipitation averages 855 Millimeters. Aurora is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.91 °C | -2.27 °C | 14 mm |
| February | -10.93 °C | -2.69 °C | 7 mm |
| March | -5.17 °C | 4.08 °C | 52 mm |
| April | 1.51 °C | 11.71 °C | 81 mm |
| May | 7.71 °C | 19.13 °C | 111 mm |
| June | 12.76 °C | 23.7 °C | 104 mm |
| July | 15.38 °C | 26.27 °C | 128 mm |
| August | 14.77 °C | 25.34 °C | 119 mm |
| September | 10.41 °C | 20.86 °C | 77 mm |
| October | 5.21 °C | 13.7 °C | 69 mm |
| November | -0.54 °C | 7.1 °C | 54 mm |
| December | -5.91 °C | 0.47 °C | 39 mm |
| Annual | 3 °C | 12.3 °C | 855 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |