Paisley, Ontario climate data is summarized below. Average annual temperatures range from 2.7 °C (low) to 12.1 °C (high). Annual precipitation averages 676 Millimeters. Paisley 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.5 °C | -2.52 °C | 0 mm |
| February | -11.01 °C | -3.12 °C | 0 mm |
| March | -5.5 °C | 3.48 °C | 34 mm |
| April | 0.95 °C | 11.71 °C | 68 mm |
| May | 6.9 °C | 18.87 °C | 89 mm |
| June | 12.04 °C | 23.56 °C | 91 mm |
| July | 14.45 °C | 25.71 °C | 63 mm |
| August | 14.21 °C | 25 °C | 80 mm |
| September | 10.11 °C | 20.77 °C | 85 mm |
| October | 5.58 °C | 14.03 °C | 102 mm |
| November | 0.04 °C | 7.33 °C | 57 mm |
| December | -5.47 °C | 0.54 °C | 7 mm |
| Annual | 2.7 °C | 12.1 °C | 676 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |