Last updated: March 2, 2024
The weather in Grand Marais, United States, during May is characterized by an average temperature of 7°C (44°F). Highs can soar to 16°C (60°F), while lows may dip to -1°C (30°F). Typically, the humidity level in Grand Marais throughout May hovers around 76%.
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Average temperature
Maximum temperature
Humidity
In May, Grand Marais averages 67 mm (2.6 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 15 hours 10 minutes of daylight, with the sun shining for approximately 9 hours 58 minutes each day. Additionally, there is a 44% probability of sunny days during this period.
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Rainy days
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Chance of sun
In May, the UV Index in Grand Marais reaches a maximum of 8, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 15 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 2 | 3 | 5 | 7 | 8 | 8 | 7 | 6 | 4 | 3 | 2 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | High | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 25 min | 30 min | 45 min | ||||||