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September Weather in Heffen, Belgium

Last updated: August 22, 2025

In Heffen, Belgium during September, the average temperature is a pleasant 16°C (60°F), with highs reaching 33°C (93°F) and lows dropping to 4°C (39°F). Expect some rain, as 50 mm (2.0 in) of precipitation can occur over about 9 days. The air remains quite moist, with an average humidity level of 82%.

September Temperature in Heffen

In September in Heffen, the average temperature is 16°C (60°F). Maximums can reach 33°C (93°F), while minimums can drop as low as 4°C (39°F). This mild climate makes Heffen an appealing destination for travelers seeking a blend of warmth and cool relief.

September Weather in Heffen: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Heffen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Heffen, September typically has an average temperature of 16°C (60°F), with highs reaching up to 33°C (93°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec404245505765666660554542
Data source: Temperature data for Heffen generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Heffen

In Heffen in September, the precipitation amount is 50 mm (2.0 in) over the course of 9 days.

September Precipitation Trends in Heffen

The chart displays monthly precipitation patterns in Heffen, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Heffen, September typically receives around 50 mm (2.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec626768355764717450775388
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Heffen

In Heffen in September humidity is 82%. With an average temperature of 16°C (60°F), this humidity feels like walking through a warm, thick blanket that clings to your skin, making every step feel heavier and travel more exhausting.

September Average Humidity in Heffen

This chart illustrates the average monthly humidity levels in Heffen, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Heffen is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%87%85%82%82%80%76%82%89%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Heffen

In Heffen 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 Heffen.

Maximum UV Index Levels in Heffen for September

The chart shows the monthly maximum UV Index (UVI) for Heffen in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Heffen typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Heffen September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Heffen Compares to Other Months

Weather in Heffen varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Heffen, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Heffen, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)62 mm (2.4 inches)91%low
February Weather6°C (42°F)67 mm (2.6 inches)89%low
March Weather7°C (46°F)68 mm (2.7 inches)87%moderate
April Weather10°C (51°F)35 mm (1.4 inches)85%moderate
May Weather14°C (57°F)57 mm (2.3 inches)82%high
June Weather18°C (65°F)64 mm (2.5 inches)82%very high
July Weather19°C (67°F)71 mm (2.8 inches)80%very high
August Weather19°C (67°F)74 mm (2.9 inches)76%high
September Weather16°C (60°F)50 mm (2.0 inches)82%moderate
October Weather13°C (55°F)77 mm (3.0 inches)89%moderate
November Weather7°C (46°F)53 mm (2.1 inches)92%low
December Weather6°C (42°F)88 mm (3.5 inches)92%low

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