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September Weather in Jalhay, Belgium

Last updated: August 22, 2025

In September, the average temperature in Jalhay, Belgium hovers around 14°C (57°F). Expect a range with a minimum of 2°C (35°F) and a pleasant maximum of 31°C (88°F). Be prepared for some rain, as 78 mm (3.1 in) of precipitation is typical over 11 days. With an average humidity of 81%, it’s a good idea to stay hydrated and enjoy the vibrant atmosphere!

September Temperature in Jalhay

In September in Jalhay, the average temperature is 14°C (57°F). Maximum temperatures can reach 31°C (88°F), while minimums can drop as low as 2°C (35°F). Be sure to pack layers to stay comfortable throughout your travels!

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

The chart illustrates September temperature patterns in Jalhay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jalhay, September typically has an average temperature of 14°C (57°F), with highs reaching up to 31°C (88°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec343741475362636357504238
Data source: Temperature data for Jalhay 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 Jalhay

In Jalhay in September, the precipitation amount is 78 mm (3.1 in) over the course of 11 days.

September Precipitation Trends in Jalhay

The chart displays monthly precipitation patterns in Jalhay, 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 Jalhay, September typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec10192110509110210391789471137
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Jalhay

In Jalhay in September, humidity is 81%. With an average temperature of 14°C (57°F), this humidity feels like a warm, dense blanket that clings to your skin, making outdoor exploration a bit heavier and more tiring.

September Average Humidity in Jalhay

This chart illustrates the average monthly humidity levels in Jalhay, 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 Jalhay is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%90%87%84%77%74%72%71%81%88%91%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Jalhay

In Jalhay in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Jalhay, you can refer to this Hourly UV Index in Jalhay.

Maximum UV Index Levels in Jalhay for September

The chart shows the monthly maximum UV Index (UVI) for Jalhay 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 Jalhay typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234589876421
Data source: Jalhay 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 Jalhay Compares to Other Months

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

This table compares monthly weather conditions in Jalhay, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)101 mm (4.0 inches)91%low
February Weather3°C (38°F)92 mm (3.6 inches)90%moderate
March Weather5°C (42°F)110 mm (4.3 inches)87%moderate
April Weather8°C (47°F)49 mm (1.9 inches)84%moderate
May Weather12°C (54°F)91 mm (3.6 inches)77%very high
June Weather17°C (62°F)102 mm (4.0 inches)74%very high
July Weather17°C (63°F)103 mm (4.1 inches)72%very high
August Weather17°C (63°F)91 mm (3.6 inches)71%high
September Weather14°C (57°F)78 mm (3.1 inches)81%high
October Weather10°C (51°F)94 mm (3.7 inches)88%moderate
November Weather5°C (42°F)71 mm (2.8 inches)91%low
December Weather3°C (38°F)137 mm (5.4 inches)92%low

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