Kitchener, Ontario climate data is summarized below. Average annual temperatures range from 36.6 °F (low) to 54 °F (high). Annual precipitation averages 31.8 Inches. Kitchener 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -23.2 °F | -19.2 °F | 203.2 in. |
| February | -24.1 °F | -19.4 °F | 203.2 in. |
| March | -20.9 °F | -15.4 °F | 1066.8 in. |
| April | -17.2 °F | -11.2 °F | 1778 in. |
| May | -13.7 °F | -7.2 °F | 2387.6 in. |
| June | -10.9 °F | -4.7 °F | 2717.8 in. |
| July | -9.7 °F | -3.4 °F | 3352.8 in. |
| August | -10.1 °F | -3.9 °F | 3175 in. |
| September | -12.3 °F | -6.2 °F | 2184.4 in. |
| October | -15.1 °F | -10.1 °F | 1625.6 in. |
| November | -18.2 °F | -13.9 °F | 1041.4 in. |
| December | -20.9 °F | -17.5 °F | 787.4 in. |
| Annual | 36.6 °F | 54 °F | 31.8 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |