Niagara-on-the-Lake, Ontario climate data is summarized below. Average annual temperatures range from 43 °F (low) to 56 °F (high). Annual precipitation averages 32 Inches. Niagara-on-the-Lake is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -20.8 °F | -17.6 °F | 762 in. |
| February | -21.4 °F | -18 °F | 584.2 in. |
| March | -18.7 °F | -14.8 °F | 1473.2 in. |
| April | -15.9 °F | -11.2 °F | 2057.4 in. |
| May | -12.8 °F | -7.5 °F | 2057.4 in. |
| June | -9.5 °F | -4.9 °F | 2311.4 in. |
| July | -7.7 °F | -3.2 °F | 1981.2 in. |
| August | -7.8 °F | -3.5 °F | 1752.6 in. |
| September | -10 °F | -5.7 °F | 2006.6 in. |
| October | -12.9 °F | -9.2 °F | 2311.4 in. |
| November | -16.3 °F | -12.8 °F | 1752.6 in. |
| December | -18.9 °F | -15.9 °F | 1574.8 in. |
| Annual | 43 °F | 56 °F | 31.97 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Normal |