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September Weather in Les Allues, France

Last updated: August 23, 2025

In Les Allues, France, the average temperature for September is a cool 10°C (50°F). Expect a range of temperatures, with a minimum dropping to -10°C (15°F) and a maximum reaching 22°C (72°F). During this month, precipitation averages about 94 mm (3.7 in) over 14 days, coupled with an average humidity of 73%. Get ready for a month of varied weather!

September Temperature in Les Allues

In September in Les Allues, the average temperature is 10°C (50°F), with maximums reaching up to 22°C (72°F) and minimums dropping as low as -10°C (15°F). Travelers should be prepared for a wide range of temperatures, so layering clothing is advisable for comfort during their visit.

September Weather in Les Allues: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Les Allues, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Les Allues, September typically has an average temperature of 10°C (50°F), with highs reaching up to 22°C (72°F) and lows dropping to around -10°C (15°F).
JanFebMarAprMayJunJulAugSepOctNovDec202832384554575750423124
Data source: Temperature data for Les Allues 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 Les Allues

In Les Allues in September, the precipitation amount is 94 mm (3.7 in) recorded over the course of 14 days.

September Precipitation Trends in Les Allues

The chart displays monthly precipitation patterns in Les Allues, 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 Les Allues, September typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec1541201588319416112411994116115261
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Les Allues

In Les Allues in September, humidity is 73%. With an average temperature of 10°C (50°F), this humidity feels like a chilly, damp embrace, making it essential to layer your clothing while traveling, as the moisture in the air can quickly chill you to the bone.

September Average Humidity in Les Allues

This chart illustrates the average monthly humidity levels in Les Allues, 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 Les Allues is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%87%84%83%78%75%72%63%73%89%91%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Les Allues

In Les Allues 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 Les Allues.

Maximum UV Index Levels in Les Allues for September

The chart shows the monthly maximum UV Index (UVI) for Les Allues 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 Les Allues typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34789101097532
Data source: Les Allues 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 Les Allues Compares to Other Months

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

This table compares monthly weather conditions in Les Allues, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)154 mm (6.0 inches)91%moderate
February Weather-2°C (28°F)120 mm (4.7 inches)87%moderate
March Weather0°C (32°F)158 mm (6.2 inches)84%high
April Weather3°C (38°F)83 mm (3.3 inches)83%very high
May Weather7°C (45°F)194 mm (7.6 inches)78%very high
June Weather12°C (54°F)161 mm (6.3 inches)75%very high
July Weather14°C (58°F)124 mm (4.9 inches)72%very high
August Weather14°C (57°F)119 mm (4.7 inches)63%very high
September Weather10°C (50°F)94 mm (3.7 inches)73%high
October Weather6°C (43°F)115 mm (4.5 inches)89%moderate
November Weather0°C (32°F)115 mm (4.5 inches)90%moderate
December Weather-5°C (24°F)261 mm (10.3 inches)90%low

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