Wollaston, Ontario climate data is summarized below. Average annual temperatures range from 31.3 °F (low) to 52.2 °F (high). Annual precipitation averages 12.2 Inches. Wollaston is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -25.9 °F | -20.2 °F | 50.8 in. |
| February | -26.5 °F | -19.9 °F | 0 in. |
| March | -22.9 °F | -16.3 °F | 279.4 in. |
| April | -18.6 °F | -11.7 °F | 584.2 in. |
| May | -14.9 °F | -7.2 °F | 812.8 in. |
| June | -12 °F | -4.9 °F | 1295.4 in. |
| July | -10.7 °F | -3.6 °F | 1651 in. |
| August | -11.2 °F | -4.1 °F | 1447.8 in. |
| September | -13.8 °F | -6.6 °F | 889 in. |
| October | -16.4 °F | -10.8 °F | 482.6 in. |
| November | -19.8 °F | -14.7 °F | 203.2 in. |
| December | -23.4 °F | -18.7 °F | 152.4 in. |
| Annual | 31.3 °F | 52.2 °F | 12.17 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |