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September Weather in Rienne, Belgium

Last updated: August 22, 2025

In Rienne, Belgium, the average temperature in September hovers around 14°C (58°F), with a minimum dipping to 2°C (36°F) and a maximum soaring to 33°C (91°F). Expect some wet days, as precipitation averages 69 mm (2.7 in) over 10 days, while the air remains quite humid at 81%.

September Temperature in Rienne

In September in Rienne, the average temperature is 14°C (58°F). The maximum can reach 33°C (91°F) and the minimum can be as low as 2°C (36°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack both lightweight clothing for the heat and warmer layers for the cooler evenings.

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

The chart illustrates September temperature patterns in Rienne, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rienne, September typically has an average temperature of 14°C (58°F), with highs reaching up to 33°C (91°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec363943485563646458514339
Data source: Temperature data for Rienne 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 Rienne

In Rienne in September, the precipitation amount is 69 mm (2.7 in) spread over a period of 10 days.

September Precipitation Trends in Rienne

The chart displays monthly precipitation patterns in Rienne, 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 Rienne, September typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec8584954982857984699972133
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rienne

In Rienne in September, humidity is 81%. With an average temperature of 14°C (58°F), this humidity feels like a warm blanket wrapping around you, making outdoor adventures sticky and challenging, while also providing a lush, vibrant atmosphere perfect for exploring.

September Average Humidity in Rienne

This chart illustrates the average monthly humidity levels in Rienne, 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 Rienne is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%84%83%83%80%76%81%88%92%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rienne

In Rienne 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 Rienne.

Maximum UV Index Levels in Rienne for September

The chart shows the monthly maximum UV Index (UVI) for Rienne 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 Rienne typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234688875421
Data source: Rienne 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 Rienne Compares to Other Months

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

This table compares monthly weather conditions in Rienne, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)85 mm (3.4 inches)91%low
February Weather4°C (39°F)84 mm (3.3 inches)89%moderate
March Weather6°C (43°F)95 mm (3.7 inches)86%moderate
April Weather9°C (49°F)49 mm (1.9 inches)84%high
May Weather13°C (55°F)82 mm (3.2 inches)82%very high
June Weather17°C (63°F)85 mm (3.3 inches)82%very high
July Weather18°C (65°F)79 mm (3.1 inches)80%very high
August Weather18°C (65°F)84 mm (3.3 inches)76%high
September Weather14°C (58°F)69 mm (2.7 inches)81%moderate
October Weather11°C (52°F)99 mm (3.9 inches)88%moderate
November Weather6°C (43°F)72 mm (2.8 inches)92%low
December Weather4°C (39°F)133 mm (5.2 inches)93%low

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