Wollaston, Ontario climate data is summarized below. Average annual temperatures range from -0.4 °C (low) to 11.2 °C (high). Annual precipitation averages 309 Millimeters. 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 | -14.64 °C | -4.27 °C | 2 mm |
| February | -15.67 °C | -3.88 °C | 0 mm |
| March | -9.25 °C | 2.58 °C | 11 mm |
| April | -1.54 °C | 10.98 °C | 23 mm |
| May | 5.14 °C | 19.04 °C | 32 mm |
| June | 10.49 °C | 23.14 °C | 51 mm |
| July | 12.74 °C | 25.55 °C | 65 mm |
| August | 11.93 °C | 24.57 °C | 57 mm |
| September | 7.21 °C | 20.09 °C | 35 mm |
| October | 2.49 °C | 12.64 °C | 19 mm |
| November | -3.72 °C | 5.61 °C | 8 mm |
| December | -10.11 °C | -1.72 °C | 6 mm |
| Annual | -0.4 °C | 11.2 °C | 309 mm |
| 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 : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |