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September Weather in Saint-Lys, France

Last updated: August 23, 2025

In Saint-Lys, France, the average temperature in September hovers around 20°C (68°F), offering a pleasant climate. However, temperatures can fluctuate significantly, with a minimum of 7°C (45°F) and a peak of 35°C (94°F). Expect approximately 59 mm (2.3 in) of precipitation spread over about 10 days, contributing to an average humidity of 73%.

September Temperature in Saint-Lys

In September in Saint-Lys, the average temperature is 20°C (68°F). The maximum can reach 35°C (94°F) and the minimum can be as low as 7°C (45°F). This moderate climate makes Saint-Lys an ideal destination for travelers seeking comfortable weather.

September Weather in Saint-Lys: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Saint-Lys, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint-Lys, September typically has an average temperature of 20°C (68°F), with highs reaching up to 35°C (94°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec424850556169737367594946
Data source: Temperature data for Saint-Lys 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 Saint-Lys

In Saint-Lys in September, the precipitation amount is 59 mm (2.3 in) over the course of 10 days.

September Precipitation Trends in Saint-Lys

The chart displays monthly precipitation patterns in Saint-Lys, 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 Saint-Lys, September typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec6066646595787054596482114
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Saint-Lys

In Saint-Lys in September, humidity is 73%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making outdoor activities somewhat sticky, yet the atmosphere remains pleasant for leisurely strolls and sightseeing.

September Average Humidity in Saint-Lys

This chart illustrates the average monthly humidity levels in Saint-Lys, 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 Saint-Lys is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%83%80%77%75%74%72%70%73%82%87%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Saint-Lys

In Saint-Lys in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Saint-Lys.

Maximum UV Index Levels in Saint-Lys for September

The chart shows the monthly maximum UV Index (UVI) for Saint-Lys 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 Saint-Lys typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24679101097532
Data source: Saint-Lys 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 Saint-Lys Compares to Other Months

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

This table compares monthly weather conditions in Saint-Lys, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)60 mm (2.4 inches)87%low
February Weather9°C (48°F)66 mm (2.6 inches)83%moderate
March Weather10°C (51°F)64 mm (2.5 inches)80%high
April Weather13°C (55°F)65 mm (2.6 inches)77%high
May Weather16°C (62°F)95 mm (3.7 inches)75%very high
June Weather21°C (69°F)78 mm (3.1 inches)74%very high
July Weather23°C (73°F)70 mm (2.7 inches)72%very high
August Weather23°C (73°F)54 mm (2.1 inches)70%very high
September Weather20°C (68°F)59 mm (2.3 inches)73%high
October Weather15°C (59°F)64 mm (2.5 inches)82%moderate
November Weather10°C (50°F)82 mm (3.2 inches)87%moderate
December Weather8°C (46°F)114 mm (4.5 inches)88%low

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