Sheffield, Ontario climate data is summarized below. Average annual temperatures range from 38.2 °F (low) to 56.1 °F (high). Annual precipitation averages 37.2 Inches. Sheffield 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 | -22.6 °F | -18.5 °F | 533.4 in. |
| February | -23.4 °F | -18.7 °F | 635 in. |
| March | -20.2 °F | -14.8 °F | 1676.4 in. |
| April | -16.8 °F | -10.6 °F | 2463.8 in. |
| May | -13.4 °F | -6.7 °F | 2717.8 in. |
| June | -10.5 °F | -4.1 °F | 2717.8 in. |
| July | -9.2 °F | -2.6 °F | 3149.6 in. |
| August | -9.5 °F | -3.1 °F | 2743.2 in. |
| September | -11.8 °F | -5.5 °F | 2336.8 in. |
| October | -14.8 °F | -9.4 °F | 2082.8 in. |
| November | -17.9 °F | -13.3 °F | 1549.4 in. |
| December | -20.5 °F | -16.9 °F | 1371.6 in. |
| Annual | 38.2 °F | 56.1 °F | 37.16 in. |
| 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 : -10°F to -5°F |
| Current Drought Conditions | Normal |