Last updated: June 18, 2025
In May, the average temperature in Wellesley, Canada is a comfortable 13°C (55°F). However, temperatures can vary significantly, with a minimum of -4°C (24°F) and a maximum reaching up to 30°C (87°F). Visitors should also be prepared for 98 mm (3.9 in) of precipitation over approximately 13 days, contributing to the moderate average humidity of 82%.
In May in Wellesley, the average temperature is 13°C (55°F), with maximums reaching up to 30°C (87°F) and minimums falling as low as -4°C (24°F). This diverse temperature range suggests that travelers should be prepared for varying weather conditions while exploring Wellesley.
In Wellesley in May, the precipitation amount is 98 mm (3.9 in) over a span of 13 days.
In Wellesley in May, humidity is 82%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities sticky and uncomfortable for traveling.
In Wellesley 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 Wellesley.
UV Risk Categories
Weather in Wellesley varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Wellesley, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (22°F) | 77 mm (3.0 inches) | 90% | low |
| February Weather | -5°C (23°F) | 81 mm (3.2 inches) | 90% | moderate |
| March Weather | 0°C (31°F) | 70 mm (2.8 inches) | 87% | moderate |
| April Weather | 5°C (42°F) | 101 mm (4.0 inches) | 87% | very high |
| May Weather | 13°C (55°F) | 98 mm (3.9 inches) | 82% | very high |
| June Weather | 18°C (65°F) | 108 mm (4.2 inches) | 81% | very high |
| July Weather | 21°C (70°F) | 79 mm (3.1 inches) | 79% | very high |
| August Weather | 20°C (68°F) | 102 mm (4.0 inches) | 80% | very high |
| September Weather | 16°C (61°F) | 83 mm (3.3 inches) | 81% | high |
| October Weather | 10°C (50°F) | 111 mm (4.4 inches) | 84% | moderate |
| November Weather | 2°C (36°F) | 89 mm (3.5 inches) | 88% | moderate |
| December Weather | -2°C (29°F) | 77 mm (3.0 inches) | 87% | low |