Windsor, Ontario climate data is summarized below. Average annual temperatures range from 5.9 °C (low) to 14.5 °C (high). Annual precipitation averages 632 Millimeters. Windsor is located in USDA Plant Hardiness Zone 7a. 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 | -6.95 °C | -0.57 °C | 17 mm |
| February | -7.67 °C | -0.54 °C | 8 mm |
| March | -1.56 °C | 7.34 °C | 40 mm |
| April | 4.08 °C | 14.3 °C | 58 mm |
| May | 10.47 °C | 20.96 °C | 76 mm |
| June | 16.14 °C | 26.05 °C | 90 mm |
| July | 18.59 °C | 28.13 °C | 81 mm |
| August | 18.09 °C | 27.25 °C | 71 mm |
| September | 13.64 °C | 22.89 °C | 68 mm |
| October | 7.85 °C | 16.24 °C | 47 mm |
| November | 1.7 °C | 9.06 °C | 46 mm |
| December | -3.07 °C | 2.6 °C | 30 mm |
| Annual | 5.9 °C | 14.5 °C | 632 mm |
| 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 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |