Last updated: March 2, 2024
The weather in Grande-Synthe, France, during May is characterized by an average temperature of 13°C (56°F). Highs can soar to 25°C (77°F), while lows may dip to 4°C (40°F). Typically, the humidity level in Grande-Synthe throughout May hovers around 82%.
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Average temperature
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Humidity
In May, Grande-Synthe averages 59 mm (2.3 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 15 hours 34 minutes of daylight, with the sun shining for approximately 13 hours 21 minutes each day. Additionally, there is a 37% probability of sunny days during this period.
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Chance of sun
In May, the UV Index in Grande-Synthe reaches a maximum of 7, indicating a level of High exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 25 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 | 1 | 2 | 3 | 5 | 6 | 7 | 7 | 6 | 5 | 4 | 2 | 1 |
| Exposure | Low | Moderate | High | Moderate | Low | ||||||||
| Time to burn | 45 min | 30 min | 25 min | 30 min | 45 min | ||||||||