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September Weather in Lisle, France

Last updated: August 23, 2025

In Lisle, France, the average temperature in September is 18°C (65°F), offering a comfortable climate. Expect temperatures to swing between a cool 5°C (42°F) and a warm 34°C (94°F). With 56 mm (2.2 in) of precipitation spread over 9 days, you might want to carry an umbrella. The air is quite humid, with an average humidity level of 79%, adding a touch of warmth to the atmosphere.

September Temperature in Lisle

In September in Lisle, the average temperature is 18°C (65°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop to as low as 5°C (42°F). This diverse range makes it an ideal time for travelers to experience a variety of outdoor activities, so pack accordingly!

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

The chart illustrates September temperature patterns in Lisle, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lisle, September typically has an average temperature of 18°C (65°F), with highs reaching up to 34°C (94°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec424650556168727065574845
Data source: Temperature data for Lisle 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 Lisle

In Lisle in September, the precipitation amount is 56 mm (2.2 in) over a period of 9 days.

September Precipitation Trends in Lisle

The chart displays monthly precipitation patterns in Lisle, 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 Lisle, September typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec66768261101905649568376122
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lisle

In Lisle in September, humidity is 79%. With an average temperature of 18°C (65°F), this humidity feels like walking through a warm mist, making traveling slightly uncomfortable and sticky, but offering a refreshing escape when you find moments of shade or a breeze.

September Average Humidity in Lisle

This chart illustrates the average monthly humidity levels in Lisle, 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 Lisle is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%87%85%84%84%82%79%75%79%86%90%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lisle

In Lisle 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 Lisle, you can refer to this Hourly UV Index in Lisle.

Maximum UV Index Levels in Lisle for September

The chart shows the monthly maximum UV Index (UVI) for Lisle 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 Lisle typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2367810996532
Data source: Lisle 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 Lisle Compares to Other Months

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

This table compares monthly weather conditions in Lisle, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)66 mm (2.6 inches)90%low
February Weather8°C (46°F)76 mm (3.0 inches)87%moderate
March Weather10°C (50°F)82 mm (3.2 inches)85%high
April Weather13°C (55°F)60 mm (2.4 inches)84%high
May Weather16°C (61°F)101 mm (4.0 inches)84%very high
June Weather20°C (68°F)90 mm (3.5 inches)82%very high
July Weather22°C (72°F)56 mm (2.2 inches)79%very high
August Weather21°C (71°F)49 mm (1.9 inches)75%very high
September Weather18°C (65°F)56 mm (2.2 inches)79%high
October Weather14°C (58°F)83 mm (3.3 inches)86%moderate
November Weather9°C (48°F)76 mm (3.0 inches)90%moderate
December Weather7°C (45°F)122 mm (4.8 inches)92%low

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