September Weather in Lons, France

Last updated: August 23, 2025

In September, the average temperature in Lons, France is a comfortable 18°C (64°F), with minimums dipping to 5°C (41°F) and maximums rising to a warm 33°C (91°F). Expect some rain, as 104 mm (4.1 in) of precipitation typically falls over 13 days, contributing to an average humidity of 75%.

September Temperature in Lons

In September in Lons, the average temperature is 18°C (64°F). The maximum can reach 33°C (91°F) and the minimum can be as low as 5°C (41°F). This delightful range makes it a perfect time for travelers to enjoy outdoor activities while also being prepared for cooler evenings.

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

The chart illustrates September temperature patterns in Lons, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lons, September typically has an average temperature of 18°C (64°F), with highs reaching up to 33°C (91°F) and lows dropping to around 5°C (41°F).

Data source: Temperature data for Lons generated using information from the Copernicus Climate Change Service.

September Precipitation in Lons

In Lons in September, the precipitation amount is 104 mm (4.1 in) over the course of 13 days.

September Precipitation Trends in Lons

The chart displays monthly precipitation patterns in Lons, 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 Lons, September typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 13 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Lons

In Lons in September, humidity is 75%. With an average temperature of 18°C (64°F), this humidity feels like a warm blanket enveloping you, making your travels a bit sticky and requiring frequent breaks in the shade to stay comfortable.

September Average Humidity in Lons

This chart illustrates the average monthly humidity levels in Lons, 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 Lons is approximately 75%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lons

In Lons in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Lons.

Maximum UV Index Levels in Lons for September

The chart shows the monthly maximum UV Index (UVI) for Lons 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 Lons typically reaches 7, which falls under the high exposure category.

Data source: Lons 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 Lons Compares to Other Months

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

This table compares monthly weather conditions in Lons, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	110 mm (4.3 inches)	86%	low
February Weather	8°C (47°F)	99 mm (3.9 inches)	85%	moderate
March Weather	9°C (49°F)	114 mm (4.5 inches)	82%	high
April Weather	12°C (53°F)	131 mm (5.2 inches)	81%	high
May Weather	15°C (59°F)	155 mm (6.1 inches)	80%	very high
June Weather	18°C (65°F)	152 mm (6.0 inches)	81%	very high
July Weather	20°C (69°F)	130 mm (5.1 inches)	80%	very high
August Weather	20°C (69°F)	99 mm (3.9 inches)	76%	very high
September Weather	18°C (64°F)	104 mm (4.1 inches)	75%	high
October Weather	14°C (57°F)	114 mm (4.5 inches)	81%	moderate
November Weather	9°C (48°F)	134 mm (5.3 inches)	85%	moderate
December Weather	8°C (46°F)	182 mm (7.2 inches)	87%	low