Toronto, Ontario climate data is summarized below. Average annual temperatures range from 41.8 °F (low) to 55.6 °F (high). Annual precipitation averages 35.5 Inches. Toronto is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -21.6 °F | -18.1 °F | 685.8 in. |
| February | -22.2 °F | -18.3 °F | 838.2 in. |
| March | -19.1 °F | -14.8 °F | 1930.4 in. |
| April | -15.9 °F | -11.3 °F | 2362.2 in. |
| May | -12.5 °F | -7.6 °F | 2235.2 in. |
| June | -9.6 °F | -4.7 °F | 2489.2 in. |
| July | -8 °F | -3 °F | 2463.8 in. |
| August | -8.1 °F | -3.3 °F | 2489.2 in. |
| September | -10.4 °F | -5.7 °F | 1778 in. |
| October | -13.6 °F | -9.6 °F | 2235.2 in. |
| November | -16.8 °F | -13.2 °F | 1828.8 in. |
| December | -19.5 °F | -16.5 °F | 1574.8 in. |
| Annual | 41.8 °F | 55.6 °F | 35.5 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Normal |