Last updated: June 18, 2025
In Grand Haven, Canada, the average temperature in May hovers around 10°C (51°F). Temperatures can swing from a chilly -8°C (19°F) to a warm 29°C (85°F). During this month, expect about 44 mm (1.7 in) of precipitation spread over 9 days, with an average humidity of 82%. Stay prepared for a mix of weather!
In May in Grand Haven, the average temperature is 10°C (51°F), with maximums reaching up to 29°C (85°F) and minimums dropping as low as -8°C (19°F). Travelers should be prepared for a wide range of temperatures, so layering clothing is advisable.
In Grand Haven in May, the precipitation amount is 44 mm (1.7 in) over the course of 9 days.
In Grand Haven in May humidity is 82%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill that clings to your skin, making outdoor adventures less appealing and prompting travelers to seek cozy indoor activities or warm drinks to counter the brisk air.
In Grand Haven in May, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Grand Haven.
UV Risk Categories
Weather in Grand Haven varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Grand Haven, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -11°C (12°F) | 26 mm (1.0 inches) | 94% | low |
| February Weather | -13°C (10°F) | 26 mm (1.0 inches) | 94% | low |
| March Weather | -6°C (22°F) | 32 mm (1.3 inches) | 89% | moderate |
| April Weather | 2°C (35°F) | 28 mm (1.1 inches) | 86% | moderate |
| May Weather | 10°C (51°F) | 44 mm (1.7 inches) | 82% | high |
| June Weather | 15°C (58°F) | 85 mm (3.3 inches) | 80% | high |
| July Weather | 16°C (61°F) | 94 mm (3.7 inches) | 83% | high |
| August Weather | 15°C (59°F) | 59 mm (2.3 inches) | 80% | high |
| September Weather | 9°C (49°F) | 48 mm (1.9 inches) | 83% | moderate |
| October Weather | 2°C (37°F) | 41 mm (1.6 inches) | 86% | moderate |
| November Weather | -6°C (21°F) | 50 mm (2.0 inches) | 91% | low |
| December Weather | -10°C (15°F) | 23 mm (0.9 inches) | 95% | low |