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September Weather in Sillery, France

Last updated: August 23, 2025

In September, the average temperature in Sillery, France hovers around 16°C (62°F). Expect a wide range of temperatures, with minimums dipping to 5°C (41°F) and maximums soaring up to 35°C (95°F). Be prepared for 59 mm (2.3 in) of precipitation over the course of 8 days, contributing to an average humidity level of 81%.

September Temperature in Sillery

In September in Sillery, the average temperature is 16°C (62°F). Maximums can reach 35°C (95°F), and minimums can be as low as 5°C (41°F). This makes Sillery a great destination for travelers seeking mild weather with the possibility of warm days and cool nights.

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

The chart illustrates September temperature patterns in Sillery, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sillery, September typically has an average temperature of 16°C (62°F), with highs reaching up to 35°C (95°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec394246515866696862544542
Data source: Temperature data for Sillery 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 Sillery

In Sillery in September, the total precipitation amount is 59 mm (2.3 in) spread over 8 days.

September Precipitation Trends in Sillery

The chart displays monthly precipitation patterns in Sillery, 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 Sillery, September typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec7374763663696461598568116
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sillery

In Sillery in September, humidity is 81%. With an average temperature of 16°C (62°F), this humidity feels like a warm embrace that can quickly leave travelers feeling sticky and drained, making outdoor adventures a bit challenging unless they stay properly hydrated and take breaks in the shade.

September Average Humidity in Sillery

This chart illustrates the average monthly humidity levels in Sillery, 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 Sillery is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%84%83%83%80%76%81%88%92%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sillery

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

Maximum UV Index Levels in Sillery for September

The chart shows the monthly maximum UV Index (UVI) for Sillery 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 Sillery typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234688886421
Data source: Sillery 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 Sillery Compares to Other Months

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

This table compares monthly weather conditions in Sillery, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)73 mm (2.9 inches)91%low
February Weather6°C (42°F)74 mm (2.9 inches)89%moderate
March Weather8°C (46°F)76 mm (3.0 inches)86%moderate
April Weather11°C (52°F)36 mm (1.4 inches)84%high
May Weather14°C (58°F)63 mm (2.5 inches)82%very high
June Weather19°C (66°F)69 mm (2.7 inches)82%very high
July Weather20°C (69°F)64 mm (2.5 inches)80%very high
August Weather20°C (68°F)61 mm (2.4 inches)76%very high
September Weather16°C (62°F)59 mm (2.3 inches)81%high
October Weather12°C (54°F)85 mm (3.3 inches)88%moderate
November Weather7°C (45°F)68 mm (2.7 inches)92%low
December Weather5°C (42°F)116 mm (4.6 inches)93%low

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