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September Weather in Pierrefonds, France

Last updated: August 23, 2025

In September, the average temperature in Pierrefonds, France is a comfortable 16°C (62°F), with possibilities ranging from a chilly 5°C (41°F) to a warm 34°C (93°F). Expect about 45 mm (1.8 in) of precipitation over approximately 8 days, contributing to an average humidity level of 81%.

September Temperature in Pierrefonds

In September in Pierrefonds, the average temperature is 16°C (62°F). Maximums can reach 34°C (93°F), while minimums can be as low as 5°C (41°F). Expect a range of warm and cool conditions, so pack accordingly for your travels.

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

The chart illustrates September temperature patterns in Pierrefonds, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pierrefonds, September typically has an average temperature of 16°C (62°F), with highs reaching up to 34°C (93°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec394346515766686762544542
Data source: Temperature data for Pierrefonds 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 Pierrefonds

In Pierrefonds in September, the precipitation amount is 45 mm (1.8 in) over the course of 8 days.

September Precipitation Trends in Pierrefonds

The chart displays monthly precipitation patterns in Pierrefonds, 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 Pierrefonds, September typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec6871713465585463457969109
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Pierrefonds

In Pierrefonds 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 Pierrefonds

This chart illustrates the average monthly humidity levels in Pierrefonds, 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 Pierrefonds 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 Pierrefonds

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

Maximum UV Index Levels in Pierrefonds for September

The chart shows the monthly maximum UV Index (UVI) for Pierrefonds 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 Pierrefonds typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689876421
Data source: Pierrefonds 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 Pierrefonds Compares to Other Months

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

This table compares monthly weather conditions in Pierrefonds, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)68 mm (2.7 inches)91%low
February Weather6°C (43°F)71 mm (2.8 inches)89%moderate
March Weather8°C (46°F)71 mm (2.8 inches)86%moderate
April Weather11°C (52°F)34 mm (1.3 inches)84%high
May Weather14°C (58°F)65 mm (2.6 inches)82%very high
June Weather19°C (66°F)58 mm (2.3 inches)82%very high
July Weather20°C (69°F)54 mm (2.1 inches)80%very high
August Weather20°C (68°F)63 mm (2.5 inches)76%high
September Weather16°C (62°F)45 mm (1.8 inches)81%high
October Weather12°C (55°F)79 mm (3.1 inches)88%moderate
November Weather7°C (46°F)69 mm (2.7 inches)92%low
December Weather6°C (43°F)108 mm (4.3 inches)93%low

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