Last updated: August 22, 2025
In Grand-Reng, Belgium, the average temperature in September is a comfortable 15°C (59°F). However, you can expect a wide range, with temperatures dipping to a minimum of 3°C (37°F) and peaking at 32°C (90°F). During this month, the region experiences an average of 57 mm (2.2 in) of precipitation over 10 days, contributing to an average humidity of 82%.
In September in Grand-Reng, the average temperature is 15°C (59°F). Maximums can reach 32°C (90°F) and minimums can be as low as 3°C (37°F). It’s advisable to pack layers and be prepared for both warm and cool weather during your travels.
In Grand-Reng in September, the precipitation amount is 57 mm (2.2 in) over a span of 10 days.
In Grand-Reng in September, humidity is 82%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sticky and uncomfortable for travelers.
In Grand-Reng in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Grand-Reng.
UV Risk Categories
Weather in Grand-Reng varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Grand-Reng, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (38°F) | 73 mm (2.9 inches) | 91% | low |
| February Weather | 5°C (41°F) | 79 mm (3.1 inches) | 89% | low |
| March Weather | 7°C (45°F) | 82 mm (3.2 inches) | 87% | moderate |
| April Weather | 10°C (50°F) | 44 mm (1.7 inches) | 85% | moderate |
| May Weather | 13°C (56°F) | 70 mm (2.8 inches) | 82% | high |
| June Weather | 17°C (64°F) | 65 mm (2.6 inches) | 82% | very high |
| July Weather | 18°C (65°F) | 66 mm (2.6 inches) | 80% | very high |
| August Weather | 18°C (65°F) | 85 mm (3.4 inches) | 76% | high |
| September Weather | 15°C (59°F) | 57 mm (2.2 inches) | 82% | moderate |
| October Weather | 12°C (53°F) | 88 mm (3.5 inches) | 89% | moderate |
| November Weather | 7°C (45°F) | 67 mm (2.6 inches) | 92% | low |
| December Weather | 5°C (41°F) | 113 mm (4.4 inches) | 92% | low |