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September Weather in Basly, France

Last updated: August 23, 2025

In September, the average temperature in Basly, France stands at a comfortable 16°C (61°F). However, temperatures can fluctuate, with minimums dropping to 4°C (40°F) and maximums soaring to 32°C (91°F). Be prepared for some humidity, as the average hovers around 79%, and expect 51 mm (2.0 in) of precipitation over approximately 12 days.

September Temperature in Basly

In September in Basly, the average temperature is 16°C (61°F), with maximums reaching 32°C (91°F) and minimums dropping as low as 4°C (40°F). This wide temperature range makes Basly an ideal destination for travelers looking to experience a variety of climates.

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

The chart illustrates September temperature patterns in Basly, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Basly, September typically has an average temperature of 16°C (61°F), with highs reaching up to 32°C (91°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec434547515763666561554845
Data source: Temperature data for Basly 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 Basly

In Basly in September, the precipitation amount is 51 mm (2.0 in) spread over 12 days.

September Precipitation Trends in Basly

The chart displays monthly precipitation patterns in Basly, 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 Basly, September typically receives around 51 mm (2.0 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec5564653871915462518277104
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Basly

In Basly in September humidity is 79%. With an average temperature of 16°C (61°F), this humidity feels like a warm, moist embrace, making travel a bit more challenging as the air tends to weigh heavily, but it also offers a refreshing atmosphere perfect for exploring local sights and enjoying nature.

September Average Humidity in Basly

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

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

Maximum UV Index Levels in Basly for September

The chart shows the monthly maximum UV Index (UVI) for Basly 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 Basly typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234689886421
Data source: Basly 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 Basly Compares to Other Months

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

This table compares monthly weather conditions in Basly, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)55 mm (2.2 inches)90%low
February Weather7°C (45°F)64 mm (2.5 inches)89%moderate
March Weather9°C (48°F)65 mm (2.5 inches)86%moderate
April Weather11°C (52°F)38 mm (1.5 inches)84%high
May Weather14°C (57°F)71 mm (2.8 inches)80%very high
June Weather17°C (63°F)91 mm (3.6 inches)80%very high
July Weather19°C (67°F)54 mm (2.1 inches)69%very high
August Weather18°C (66°F)62 mm (2.4 inches)73%very high
September Weather16°C (61°F)51 mm (2.0 inches)79%high
October Weather13°C (56°F)82 mm (3.2 inches)89%moderate
November Weather9°C (48°F)77 mm (3.0 inches)92%low
December Weather7°C (46°F)104 mm (4.1 inches)92%low

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