September Weather in Paris, United States

Last updated: June 24, 2025

In September, the average temperature in Paris, United States hovers around 25°C (78°F), with a minimum of 10°C (51°F) and a potential maximum of 38°C (101°F). Expect about 88 mm (3.5 in) of precipitation over 6 days, contributing to an average humidity level of 65%.

September Temperature in Paris

In September in Paris, the average temperature is 25°C (78°F). Maximums can reach 38°C (101°F) and minimums can be as low as 10°C (51°F). This makes it an ideal time for travelers to enjoy both warm days and cool evenings while exploring all that Paris has to offer.

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 25°C (78°F), with highs reaching up to 38°C (101°F) and lows dropping to around 10°C (51°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 88 mm (3.5 in) over the course of 6 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 88 mm (3.5 inches) of precipitation spread over approximately 6 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 Paris

In Paris in September, humidity is 65%. With an average temperature of 25°C (78°F), this humidity feels like a warm, enveloping shawl that makes traveling slightly more strenuous, requiring frequent breaks to stay refreshed and hydrated.

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 65%, 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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check 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 10, 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	7°C (45°F)	89 mm (3.5 inches)	80%	moderate
February Weather	8°C (48°F)	129 mm (5.1 inches)	79%	high
March Weather	14°C (58°F)	132 mm (5.2 inches)	78%	very high
April Weather	17°C (63°F)	190 mm (7.5 inches)	78%	very high
May Weather	22°C (73°F)	197 mm (7.8 inches)	81%	extreme
June Weather	27°C (80°F)	110 mm (4.3 inches)	78%	extreme
July Weather	28°C (83°F)	67 mm (2.6 inches)	73%	extreme
August Weather	28°C (83°F)	96 mm (3.8 inches)	66%	extreme
September Weather	25°C (78°F)	88 mm (3.5 inches)	65%	very high
October Weather	19°C (66°F)	136 mm (5.4 inches)	72%	very high
November Weather	12°C (54°F)	64 mm (2.5 inches)	82%	high
December Weather	10°C (50°F)	97 mm (3.8 inches)	87%	moderate