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September Weather in Saint-Cyr, France

Last updated: August 23, 2025

In September, the average temperature in Saint-Cyr, France is a pleasant 18°C (65°F). During this time, temperatures can range from a cool 5°C (41°F) to a warm 35°C (96°F). Expect about 33 mm (1.3 in) of precipitation spread over 6 days, with an average humidity level of 76%.

September Temperature in Saint-Cyr

In September in Saint-Cyr, the average temperature is 18°C (65°F), with maximums reaching 35°C (96°F) and minimums dropping as low as 5°C (41°F). Pack for warm days and cool nights to make the most of your travel experience!

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

The chart illustrates September temperature patterns in Saint-Cyr, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint-Cyr, September typically has an average temperature of 18°C (65°F), with highs reaching up to 35°C (96°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec414548546067717064564744
Data source: Temperature data for Saint-Cyr 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-Cyr

In Saint-Cyr, in September, the precipitation amount is 33 mm (1.3 in) over the course of 6 days.

September Precipitation Trends in Saint-Cyr

The chart displays monthly precipitation patterns in Saint-Cyr, 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-Cyr, September typically receives around 33 mm (1.3 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec546272527877342633767494
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Saint-Cyr

In Saint-Cyr in September, humidity is 76%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace, making travel a little sticky but enjoyable, as long as you stay hydrated and take breaks in the shade.

September Average Humidity in Saint-Cyr

This chart illustrates the average monthly humidity levels in Saint-Cyr, 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-Cyr is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%85%84%83%79%71%68%76%87%91%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Saint-Cyr

In Saint-Cyr 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 Saint-Cyr, you can refer to this Hourly UV Index in Saint-Cyr.

Maximum UV Index Levels in Saint-Cyr for September

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

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

This table compares monthly weather conditions in Saint-Cyr, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)54 mm (2.1 inches)90%low
February Weather7°C (45°F)62 mm (2.5 inches)88%moderate
March Weather9°C (49°F)72 mm (2.8 inches)85%moderate
April Weather12°C (54°F)52 mm (2.0 inches)83%high
May Weather15°C (60°F)78 mm (3.1 inches)83%very high
June Weather19°C (67°F)77 mm (3.0 inches)79%very high
July Weather21°C (71°F)34 mm (1.4 inches)71%very high
August Weather21°C (70°F)25 mm (1.0 inches)68%very high
September Weather18°C (65°F)33 mm (1.3 inches)76%high
October Weather14°C (57°F)76 mm (3.0 inches)87%moderate
November Weather8°C (47°F)74 mm (2.9 inches)91%low
December Weather7°C (45°F)94 mm (3.7 inches)93%low

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