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September Weather in Aalter, Belgium

Last updated: August 22, 2025

In Aalter, Belgium, the average temperature in September hovers around 16°C (60°F), with minimums dipping to 4°C (40°F) and maximums soaring up to 32°C (90°F). Expect about 57 mm (2.3 in) of precipitation spread over 9 days, contributing to an average humidity of 82%.

September Temperature in Aalter

In September in Aalter, the average temperature is 16°C (60°F), with maximums reaching 32°C (90°F) and minimums dropping as low as 4°C (40°F). This range makes it an ideal destination for travelers seeking moderate weather and a variety of outdoor activities.

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

The chart illustrates September temperature patterns in Aalter, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Aalter, September typically has an average temperature of 16°C (60°F), with highs reaching up to 32°C (90°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec404245505664666660544643
Data source: Temperature data for Aalter 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 Aalter

In Aalter in September, the precipitation amount is 57 mm (2.3 in) over the course of 9 days.

September Precipitation Trends in Aalter

The chart displays monthly precipitation patterns in Aalter, 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 Aalter, September typically receives around 57 mm (2.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec646369406365677857855594
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Aalter

In Aalter 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 Aalter

This chart illustrates the average monthly humidity levels in Aalter, 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 Aalter 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 Aalter

In Aalter 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 Aalter.

Maximum UV Index Levels in Aalter for September

The chart shows the monthly maximum UV Index (UVI) for Aalter 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 Aalter typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Aalter 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 Aalter Compares to Other Months

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

This table compares monthly weather conditions in Aalter, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)64 mm (2.5 inches)91%low
February Weather6°C (42°F)63 mm (2.5 inches)89%low
March Weather7°C (46°F)69 mm (2.7 inches)87%moderate
April Weather10°C (50°F)40 mm (1.6 inches)85%moderate
May Weather14°C (57°F)63 mm (2.5 inches)82%high
June Weather18°C (64°F)65 mm (2.6 inches)82%very high
July Weather19°C (66°F)67 mm (2.6 inches)80%very high
August Weather19°C (66°F)78 mm (3.1 inches)76%high
September Weather16°C (60°F)57 mm (2.3 inches)82%moderate
October Weather12°C (55°F)85 mm (3.4 inches)89%moderate
November Weather8°C (46°F)55 mm (2.2 inches)92%low
December Weather6°C (43°F)94 mm (3.7 inches)92%low

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