nomadseason

September Weather in Lassy, France

Last updated: August 23, 2025

In September, the average temperature in Lassy, France is a pleasant 16°C (62°F). You can expect a range from a cool 5°C (41°F) to a warm 32°C (90°F). With an average precipitation of 55 mm (2.2 in) occurring over 9 days, it's wise to prepare for some rainy spells. Additionally, be ready for a humidity level of around 75%, making the atmosphere quite refreshing!

September Temperature in Lassy

In September in Lassy, the average temperature is 16°C (62°F). Maximum temperatures can reach 32°C (90°F), while minimums can drop as low as 5°C (41°F). This range makes it an ideal time for travelers to enjoy a variety of outdoor activities, from warm afternoons to cooler evenings.

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

The chart illustrates September temperature patterns in Lassy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lassy, September typically has an average temperature of 16°C (62°F), with highs reaching up to 32°C (90°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec434548525764676561554745
Data source: Temperature data for Lassy generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Lassy

In Lassy in September, the precipitation amount is 55 mm (2.2 in) over a span of 9 days.

September Precipitation Trends in Lassy

The chart displays monthly precipitation patterns in Lassy, 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 Lassy, September typically receives around 55 mm (2.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec4660584867100505355887197
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Lassy

In Lassy in September, humidity is 75%. With an average temperature of 16°C (62°F), this humidity feels like a heavy blanket wrapping around you, making traveling feel a bit stifling and sticky, as the air clings to your skin and can sap your energy.

September Average Humidity in Lassy

This chart illustrates the average monthly humidity levels in Lassy, 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 Lassy is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%84%83%81%75%65%67%75%85%88%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lassy

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

Maximum UV Index Levels in Lassy for September

The chart shows the monthly maximum UV Index (UVI) for Lassy 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 Lassy typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986422
Data source: Lassy 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 Lassy Compares to Other Months

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

This table compares monthly weather conditions in Lassy, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)46 mm (1.8 inches)88%low
February Weather7°C (45°F)60 mm (2.3 inches)87%moderate
March Weather9°C (48°F)58 mm (2.3 inches)84%moderate
April Weather11°C (52°F)48 mm (1.9 inches)83%high
May Weather14°C (58°F)67 mm (2.6 inches)81%very high
June Weather18°C (64°F)100 mm (3.9 inches)75%very high
July Weather19°C (67°F)50 mm (2.0 inches)65%very high
August Weather19°C (66°F)53 mm (2.1 inches)67%very high
September Weather16°C (62°F)55 mm (2.2 inches)75%high
October Weather13°C (55°F)88 mm (3.5 inches)85%moderate
November Weather8°C (48°F)71 mm (2.8 inches)88%low
December Weather7°C (46°F)97 mm (3.8 inches)90%low

Compare Lassy's Climate with Cities Worldwide