Last updated: June 18, 2025
In May, the average temperature in Saint-Jean-sur-Richelieu, Canada hovers around 14°C (57°F). However, be prepared for a wide range, as temperatures can dip to a chilly -1°C (30°F), or soar up to a scorching 37°C (98°F). During this time, the region experiences an average precipitation of 97 mm (3.8 in) spread over approximately 12 days, and with an average humidity of 80%, you might want to stay hydrated and enjoy the refreshing atmosphere!
In May in Saint-Jean-sur-Richelieu, the average temperature is 14°C (57°F). The maximum can reach 37°C (98°F) and the minimum can be as low as -1°C (30°F). This wide range makes Saint-Jean-sur-Richelieu a destination for travelers to experience both warm and cool weather.
In Saint-Jean-sur-Richelieu in May, the precipitation amount is 97 mm (3.8 in) spread over 12 days.
In Saint-Jean-sur-Richelieu in May, humidity is 80%. With an average temperature of 14°C (57°F), this humidity feels like a warm, damp blanket wrapping around you, making travel uncomfortable and sticky, as sweat clings to your skin and the air feels heavy with moisture.
In Saint-Jean-sur-Richelieu 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 Saint-Jean-sur-Richelieu.
UV Risk Categories
Weather in Saint-Jean-sur-Richelieu varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Saint-Jean-sur-Richelieu, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (19°F) | 84 mm (3.3 inches) | 93% | low |
| February Weather | -6°C (21°F) | 79 mm (3.1 inches) | 92% | moderate |
| March Weather | -1°C (30°F) | 82 mm (3.2 inches) | 86% | moderate |
| April Weather | 6°C (44°F) | 114 mm (4.5 inches) | 85% | high |
| May Weather | 14°C (57°F) | 97 mm (3.8 inches) | 80% | very high |
| June Weather | 19°C (67°F) | 111 mm (4.4 inches) | 74% | very high |
| July Weather | 22°C (72°F) | 113 mm (4.4 inches) | 76% | very high |
| August Weather | 21°C (70°F) | 116 mm (4.6 inches) | 75% | very high |
| September Weather | 16°C (62°F) | 71 mm (2.8 inches) | 78% | high |
| October Weather | 10°C (51°F) | 144 mm (5.7 inches) | 86% | moderate |
| November Weather | 2°C (35°F) | 114 mm (4.5 inches) | 88% | moderate |
| December Weather | -4°C (25°F) | 81 mm (3.2 inches) | 89% | low |