Last updated: August 22, 2025
In September, the average temperature in Sint-Denijs, Belgium hovers around 16°C (61°F), with a minimum of 5°C (41°F) and a maximum reaching 31°C (89°F). Expect a moderate amount of precipitation, averaging 52 mm (2.1 in) over 9 days, while the average humidity remains relatively high at 82%.
In September in Sint-Denijs, the average temperature is 16°C (61°F), with maximums reaching 31°C (89°F) and minimums dropping as low as 5°C (41°F). This diverse temperature range makes Sint-Denijs an ideal destination for travelers seeking to experience both warm and moderate weather.
In Sint-Denijs in September, the total precipitation amount is 52 mm (2.1 in) over the course of 9 days.
In Sint-Denijs in September humidity is 82%. With an average temperature of 16°C (61°F), this humidity feels like a heavy blanket enveloping you, making travel feel a bit sluggish and requiring frequent breaks to hydrate and cool down.
In Sint-Denijs 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 Sint-Denijs.
UV Risk Categories
Weather in Sint-Denijs varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sint-Denijs, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (40°F) | 67 mm (2.6 inches) | 91% | low |
| February Weather | 6°C (43°F) | 65 mm (2.6 inches) | 89% | low |
| March Weather | 8°C (46°F) | 67 mm (2.6 inches) | 87% | moderate |
| April Weather | 10°C (51°F) | 37 mm (1.4 inches) | 85% | moderate |
| May Weather | 14°C (57°F) | 58 mm (2.3 inches) | 82% | high |
| June Weather | 18°C (64°F) | 61 mm (2.4 inches) | 82% | very high |
| July Weather | 19°C (66°F) | 55 mm (2.2 inches) | 80% | very high |
| August Weather | 19°C (66°F) | 75 mm (3.0 inches) | 76% | high |
| September Weather | 16°C (61°F) | 52 mm (2.1 inches) | 82% | moderate |
| October Weather | 13°C (55°F) | 84 mm (3.3 inches) | 89% | moderate |
| November Weather | 8°C (46°F) | 58 mm (2.3 inches) | 92% | low |
| December Weather | 6°C (43°F) | 97 mm (3.8 inches) | 92% | low |