Windsor, Quebec climate data is summarized below. Average annual temperatures range from 0.7 °C (low) to 11.5 °C (high). Annual precipitation averages 225 Millimeters. Windsor is located in USDA Plant Hardiness Zone 5a. 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 | -14.25 °C | -4.4 °C | 0 mm |
| February | -14.28 °C | -4 °C | 0 mm |
| March | -8.58 °C | 2.38 °C | 1 mm |
| April | -0.3 °C | 11.28 °C | 17 mm |
| May | 6.4 °C | 19.13 °C | 24 mm |
| June | 11.31 °C | 23.13 °C | 30 mm |
| July | 14.18 °C | 26 °C | 48 mm |
| August | 13.4 °C | 24.98 °C | 43 mm |
| September | 8.68 °C | 20.65 °C | 20 mm |
| October | 3.44 °C | 13.37 °C | 23 mm |
| November | -2.57 °C | 6.27 °C | 13 mm |
| December | -9.25 °C | -1.44 °C | 6 mm |
| Annual | 0.7 °C | 11.5 °C | 225 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 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |