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September Weather in Saint-Cast-le-Guildo, France

Last updated: August 23, 2025

In September, the average temperature in Saint-Cast-le-Guildo, France is a pleasant 17°C (63°F). Expect a range, with minimums dropping to 12°C (53°F) and maximums reaching up to 25°C (77°F). During this time, anticipate 79 mm (3.1 in) of precipitation over approximately 11 days, paired with an average humidity of 79%, making it a comfortable yet potentially wet month.

September Temperature in Saint-Cast-le-Guildo

In September in Saint-Cast-le-Guildo, the average temperature is 17°C (63°F), with maximums reaching 25°C (77°F) and minimums dipping as low as 12°C (53°F). This pleasant climate makes it an ideal time to explore the attractions and enjoy outdoor activities in Saint-Cast-le-Guildo.

September Weather in Saint-Cast-le-Guildo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Saint-Cast-le-Guildo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint-Cast-le-Guildo, September typically has an average temperature of 17°C (63°F), with highs reaching up to 25°C (77°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec474748515560636463595350
Data source: Temperature data for Saint-Cast-le-Guildo 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-Cast-le-Guildo

In Saint-Cast-le-Guildo in September, the total precipitation amount is 79 mm (3.1 in), falling over the course of 11 days.

September Precipitation Trends in Saint-Cast-le-Guildo

The chart displays monthly precipitation patterns in Saint-Cast-le-Guildo, 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-Cast-le-Guildo, September typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec858766396375435679139117159
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Saint-Cast-le-Guildo

In Saint-Cast-le-Guildo in September, humidity is 79%. With an average temperature of 17°C (63°F), this humidity feels like a warm, muggy embrace, making outdoor activities less comfortable and prompting travelers to seek shaded areas or cool refreshments more frequently.

September Average Humidity in Saint-Cast-le-Guildo

This chart illustrates the average monthly humidity levels in Saint-Cast-le-Guildo, 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-Cast-le-Guildo is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%89%86%85%80%80%69%73%79%89%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Saint-Cast-le-Guildo

In Saint-Cast-le-Guildo 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-Cast-le-Guildo, you can refer to this Hourly UV Index in Saint-Cast-le-Guildo.

Maximum UV Index Levels in Saint-Cast-le-Guildo for September

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

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

This table compares monthly weather conditions in Saint-Cast-le-Guildo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)85 mm (3.4 inches)90%low
February Weather8°C (47°F)87 mm (3.4 inches)89%moderate
March Weather9°C (49°F)66 mm (2.6 inches)86%moderate
April Weather10°C (51°F)39 mm (1.5 inches)84%high
May Weather13°C (55°F)63 mm (2.5 inches)80%very high
June Weather15°C (60°F)75 mm (3.0 inches)80%very high
July Weather17°C (64°F)43 mm (1.7 inches)69%very high
August Weather18°C (64°F)56 mm (2.2 inches)73%very high
September Weather17°C (63°F)79 mm (3.1 inches)79%high
October Weather15°C (59°F)139 mm (5.5 inches)89%moderate
November Weather11°C (53°F)117 mm (4.6 inches)92%low
December Weather10°C (50°F)159 mm (6.2 inches)92%low

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