Mitchell, Ontario climate data is summarized below. Average annual temperatures range from 36.8 °F (low) to 54.6 °F (high). Annual precipitation averages 14.6 Inches. 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 | -23.2 °F | -19.2 °F | 0 in. |
| February | -24.2 °F | -19.4 °F | 0 in. |
| March | -20.9 °F | -15.5 °F | 508 in. |
| April | -17.3 °F | -10.9 °F | 584.2 in. |
| May | -13.5 °F | -6.8 °F | 1219.2 in. |
| June | -10.8 °F | -4.3 °F | 1447.8 in. |
| July | -9.7 °F | -3.1 °F | 2082.8 in. |
| August | -9.9 °F | -3.5 °F | 1549.4 in. |
| September | -12.2 °F | -5.8 °F | 1041.4 in. |
| October | -15 °F | -9.8 °F | 533.4 in. |
| November | -18.2 °F | -13.8 °F | 304.8 in. |
| December | -20.8 °F | -17.5 °F | 127 in. |
| Annual | 36.8 °F | 54.6 °F | 14.57 in. |
| 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 : -10°F to -5°F |
| Current Drought Conditions | Normal |