Last updated: March 2, 2024
The weather in Boulogne-sur-Gesse, France, during September is characterized by an average temperature of 18°C (66°F). Highs can soar to 31°C (88°F), while lows may dip to 7°C (46°F). Typically, the humidity level in Boulogne-sur-Gesse throughout September hovers around 73%.
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Humidity
In September, Boulogne-sur-Gesse averages 74 mm (2.9 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 12 hours 27 minutes of daylight, with the sun shining for approximately 11 hours 17 minutes each day. Additionally, there is a 30% probability of sunny days during this period.
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In September, the UV Index in Boulogne-sur-Gesse 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 | 0 | 1 | 1 | 2 | 4 | 6 | 7 | 7 | 7 | 5 | 3 | 2 | 1 |
| Exposure | Low | Moderate | High | Moderate | Low | ||||||||
| Time to burn | 45 min | 30 min | 25 min | 30 min | 45 min | ||||||||