Last updated: June 18, 2025
In Windsor, Canada, the average temperature in May hovers around 15°C (60°F). However, prepare for a range of possible temperatures, with lows reaching -1°C (30°F) and highs soaring to 31°C (87°F). Expect 111 mm (4.4 in) of precipitation spread over 15 days, coupled with an average humidity of 80%. Whether you’re enjoying the cooler days or bracing for a warm spell, don't forget your umbrella!
In May in Windsor, the average temperature is 15°C (60°F). Maximums can reach 31°C (87°F), while minimums can drop as low as -1°C (30°F). This makes Windsor a destination with a diverse climate, so travelers should be prepared for both warm and cool conditions.
In Windsor in May, the total precipitation amount is 111 mm (4.4 in) spread over 15 days.
In Windsor in May humidity is 80%. With an average temperature of 15°C (60°F), this humidity feels like a warm, sticky embrace that can make even the simplest stroll feel like a workout, leaving travelers yearning for a refreshing breeze or shade to escape the weight of the air.
In Windsor in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Windsor.
UV Risk Categories
Weather in Windsor varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Windsor, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (28°F) | 67 mm (2.6 inches) | 88% | low |
| February Weather | -2°C (29°F) | 68 mm (2.7 inches) | 87% | moderate |
| March Weather | 3°C (37°F) | 72 mm (2.8 inches) | 85% | moderate |
| April Weather | 8°C (47°F) | 90 mm (3.5 inches) | 86% | very high |
| May Weather | 15°C (60°F) | 111 mm (4.4 inches) | 80% | very high |
| June Weather | 21°C (71°F) | 80 mm (3.2 inches) | 80% | very high |
| July Weather | 24°C (76°F) | 86 mm (3.4 inches) | 80% | very high |
| August Weather | 23°C (74°F) | 75 mm (2.9 inches) | 80% | very high |
| September Weather | 20°C (67°F) | 58 mm (2.3 inches) | 80% | very high |
| October Weather | 13°C (56°F) | 99 mm (3.9 inches) | 84% | moderate |
| November Weather | 5°C (41°F) | 82 mm (3.2 inches) | 89% | moderate |
| December Weather | 1°C (34°F) | 59 mm (2.3 inches) | 86% | low |