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September Weather in Gergy, France

Last updated: August 23, 2025

In Gergy, France, the average temperature in September is a comfortable 18°C (64°F), with minimums dipping to about 3°C (38°F) and maximums reaching up to 34°C (94°F). Expect some rain, as precipitation averages 51 mm (2.0 in) over approximately 8 days. The atmosphere is quite humid, with an average humidity of 78%.

September Temperature in Gergy

In September in Gergy, the average temperature is 18°C (64°F). Maximums can reach 34°C (94°F) and minimums can drop as low as 3°C (38°F). Be prepared for a wide range of temperatures, making it essential to pack accordingly for your travels.

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

The chart illustrates September temperature patterns in Gergy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gergy, September typically has an average temperature of 18°C (64°F), with highs reaching up to 34°C (94°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec374246535968727164554541
Data source: Temperature data for Gergy 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 Gergy

In Gergy in September, the total precipitation amount is 51 mm (2.0 in), spread over a duration of 8 days.

September Precipitation Trends in Gergy

The chart displays monthly precipitation patterns in Gergy, 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 Gergy, September typically receives around 51 mm (2.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec74648350101796154528483133
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Gergy

In Gergy in September, humidity is 78%. With an average temperature of 18°C (64°F), this humidity feels like a warm, thick blanket wrapping around you, making traveling feel a bit sticky and sluggish, yet the coolness of the air tempers the intensity, inviting you to explore at a leisurely pace.

September Average Humidity in Gergy

This chart illustrates the average monthly humidity levels in Gergy, 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 Gergy is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%84%82%82%79%72%78%88%91%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Gergy

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

Maximum UV Index Levels in Gergy for September

The chart shows the monthly maximum UV Index (UVI) for Gergy 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 Gergy typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
Data source: Gergy 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 Gergy Compares to Other Months

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

This table compares monthly weather conditions in Gergy, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)73 mm (2.9 inches)91%low
February Weather6°C (43°F)64 mm (2.5 inches)89%moderate
March Weather8°C (47°F)83 mm (3.2 inches)86%moderate
April Weather12°C (53°F)50 mm (2.0 inches)84%high
May Weather15°C (59°F)101 mm (4.0 inches)82%very high
June Weather20°C (68°F)79 mm (3.1 inches)82%very high
July Weather22°C (72°F)60 mm (2.4 inches)79%very high
August Weather22°C (71°F)53 mm (2.1 inches)72%very high
September Weather18°C (64°F)51 mm (2.0 inches)78%high
October Weather13°C (55°F)84 mm (3.3 inches)88%moderate
November Weather7°C (45°F)83 mm (3.2 inches)91%low
December Weather5°C (42°F)133 mm (5.2 inches)93%low

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