Last updated: March 2, 2024
The weather in Grand-Halleux, Belgium, during September is characterized by an average temperature of 13°C (56°F). Highs can soar to 26°C (79°F), while lows may dip to 4°C (39°F). Typically, the humidity level in Grand-Halleux throughout September hovers around 81%.
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Humidity
In September, Grand-Halleux averages 82 mm (3.2 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 12 hours 33 minutes of daylight, with the sun shining for approximately 10 hours 37 minutes each day. Additionally, there is a 37% probability of sunny days during this period.
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In September, the UV Index in Grand-Halleux reaches a maximum of 6, 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 | 1 | 2 | 4 | 5 | 6 | 6 | 5 | 4 | 2 | 1 | 1 |
| Exposure | Low | Moderate | High | Moderate | Low | ||||||||
| Time to burn | 45 min | 30 min | 25 min | 30 min | 45 min | ||||||||