Mitchell, Ontario climate data is summarized below. Average annual temperatures range from 2.6 °C (low) to 12.6 °C (high). Annual precipitation averages 370 Millimeters. Mitchell is located in USDA Plant Hardiness Zone 6a. 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 | -9.75 °C | -2.56 °C | 0 mm |
| February | -11.49 °C | -2.93 °C | 0 mm |
| March | -5.55 °C | 4.17 °C | 20 mm |
| April | 0.93 °C | 12.38 °C | 23 mm |
| May | 7.64 °C | 19.76 °C | 48 mm |
| June | 12.57 °C | 24.27 °C | 57 mm |
| July | 14.5 °C | 26.38 °C | 82 mm |
| August | 14.13 °C | 25.63 °C | 61 mm |
| September | 10.05 °C | 21.55 °C | 41 mm |
| October | 5.04 °C | 14.31 °C | 21 mm |
| November | -0.69 °C | 7.1 °C | 12 mm |
| December | -5.46 °C | 0.55 °C | 5 mm |
| Annual | 2.6 °C | 12.6 °C | 370 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |