Welland, Ontario climate data is summarized below. Average annual temperatures range from 40.8 °F (low) to 56.7 °F (high). Annual precipitation averages 33.3 Inches. Welland is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -21.8 °F | -18.1 °F | 558.8 in. |
| February | -22.6 °F | -18.5 °F | 584.2 in. |
| March | -19.5 °F | -14.6 °F | 1498.6 in. |
| April | -16.3 °F | -10.6 °F | 2057.4 in. |
| May | -12.9 °F | -6.6 °F | 2260.6 in. |
| June | -9.8 °F | -4.1 °F | 2209.8 in. |
| July | -8.2 °F | -2.8 °F | 2108.2 in. |
| August | -8.4 °F | -3.1 °F | 1879.6 in. |
| September | -10.8 °F | -5.4 °F | 2438.4 in. |
| October | -13.8 °F | -9.2 °F | 2590.8 in. |
| November | -17 °F | -12.8 °F | 1803.4 in. |
| December | -19.5 °F | -16.2 °F | 1473.2 in. |
| Annual | 40.8 °F | 56.7 °F | 33.28 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |