September Weather in Paris, United States

Last updated: June 24, 2025

In September, the average temperature in Paris, United States is a comfortable 21°C (71°F). Expect a minimum of 7°C (46°F) and a maximum that can soar up to 36°C (96°F). During this month, anticipate 123 mm (4.9 in) of precipitation spread over 9 days, contributing to an average humidity of 73%.

September Temperature in Paris

In September in Paris, the average temperature is 21°C (71°F). Maximum temperatures can reach 36°C (96°F), while minimums can drop as low as 7°C (46°F). This diverse climate makes Paris a great destination for travelers seeking both warm and mild weather.

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

The chart illustrates September temperature patterns in Paris, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Paris, September typically has an average temperature of 21°C (71°F), with highs reaching up to 36°C (96°F) and lows dropping to around 7°C (46°F).

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

September Precipitation in Paris

In Paris in September, the precipitation amount is 123 mm (4.9 in) over a period of 9 days.

September Precipitation Trends in Paris

The chart displays monthly precipitation patterns in Paris, 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 Paris, September typically receives around 123 mm (4.9 inches) of precipitation spread over approximately 9 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Paris

In Paris in September humidity is 73%. With an average temperature of 21°C (71°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities a bit uncomfortable, but with proper hydration and breaks in the shade, it’s still manageable for traveling.

September Average Humidity in Paris

This chart illustrates the average monthly humidity levels in Paris, 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 Paris is approximately 73%, 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 Paris

In Paris in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Paris.

Maximum UV Index Levels in Paris for September

The chart shows the monthly maximum UV Index (UVI) for Paris 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 Paris typically reaches 8, which falls under the very high exposure category.

Data source: Paris 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 Paris Compares to Other Months

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

This table compares monthly weather conditions in Paris, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (36°F)	97 mm (3.8 inches)	88%	moderate
February Weather	4°C (40°F)	134 mm (5.3 inches)	88%	moderate
March Weather	8°C (47°F)	131 mm (5.2 inches)	87%	high
April Weather	13°C (55°F)	139 mm (5.5 inches)	85%	very high
May Weather	19°C (67°F)	126 mm (5.0 inches)	81%	very high
June Weather	23°C (73°F)	179 mm (7.0 inches)	82%	very high
July Weather	25°C (78°F)	101 mm (4.0 inches)	81%	very high
August Weather	24°C (76°F)	100 mm (3.9 inches)	73%	very high
September Weather	21°C (71°F)	123 mm (4.9 inches)	73%	very high
October Weather	15°C (60°F)	109 mm (4.3 inches)	78%	high
November Weather	7°C (45°F)	86 mm (3.4 inches)	89%	moderate
December Weather	5°C (41°F)	127 mm (5.0 inches)	87%	moderate