Last updated: June 24, 2025
The average temperature in Paris, United States during September is a pleasant 20°C (68°F). Expect minimums dipping to 5°C (41°F) and maximums soaring to 34°C (93°F). Prepare for 120 mm (4.7 in) of precipitation spread over 10 days, coupled with an average humidity of 77%. Stay comfortable and ready for varying weather conditions!
In September in Paris, the average temperature is 20°C (68°F). Maximums can reach 34°C (93°F) and minimums can be as low as 5°C (41°F). Travelers should be prepared for warm days and cool nights, making layering essentials for this time of year.
In Paris in September, the precipitation amount is 120 mm (4.7 in) spread over a duration of 10 days.
In Paris in September, humidity is 77%. With an average temperature of 20°C (68°F), this humidity feels like a warm, sticky embrace, making it essential for travelers to stay hydrated and take breaks in shaded areas to avoid feeling sluggish in the heat.
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.
UV Risk Categories
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.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -1°C (31°F) | 90 mm (3.6 inches) | 88% | moderate |
February Weather | 1°C (35°F) | 115 mm (4.5 inches) | 88% | moderate |
March Weather | 5°C (41°F) | 103 mm (4.0 inches) | 87% | high |
April Weather | 11°C (51°F) | 130 mm (5.1 inches) | 87% | very high |
May Weather | 17°C (62°F) | 134 mm (5.3 inches) | 81% | very high |
June Weather | 21°C (70°F) | 131 mm (5.2 inches) | 83% | very high |
July Weather | 24°C (75°F) | 134 mm (5.3 inches) | 82% | very high |
August Weather | 23°C (73°F) | 89 mm (3.5 inches) | 76% | very high |
September Weather | 20°C (68°F) | 120 mm (4.7 inches) | 77% | very high |
October Weather | 14°C (57°F) | 120 mm (4.7 inches) | 82% | high |
November Weather | 5°C (42°F) | 92 mm (3.6 inches) | 89% | moderate |
December Weather | 2°C (36°F) | 99 mm (3.9 inches) | 86% | low |