Last updated: August 23, 2025
In September, the average temperature in Clairefontaine-en-Yvelines, France is a pleasant 17°C (62°F), with minimums dipping to 4°C (40°F) and soaring up to 34°C (94°F). During this time, expect about 46 mm (1.8 in) of precipitation spread over 8 days, contributing to an average humidity of 76%. Stay prepared for a mix of conditions!
In September in Clairefontaine-en-Yvelines, the average temperature is 17°C (62°F), with maximums reaching up to 34°C (94°F) and minimums dropping as low as 4°C (40°F). This climate makes it ideal for travelers seeking to enjoy mild days and cool evenings.
In Clairefontaine-en-Yvelines in September, the precipitation amount is 46 mm (1.8 in) over the course of 8 days.
In Clairefontaine-en-Yvelines in September, humidity is 76%. With an average temperature of 17°C (62°F), this humidity feels like a warm, enveloping embrace, making travel feel slightly more challenging as it can lead to a sticky discomfort, especially during outdoor excursions.
In Clairefontaine-en-Yvelines 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 Clairefontaine-en-Yvelines, you can refer to this Hourly UV Index in Clairefontaine-en-Yvelines.
UV Risk Categories
Weather in Clairefontaine-en-Yvelines varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Clairefontaine-en-Yvelines, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 4°C (40°F) | 53 mm (2.1 inches) | 91% | low |
February Weather | 6°C (43°F) | 62 mm (2.4 inches) | 89% | moderate |
March Weather | 8°C (47°F) | 70 mm (2.8 inches) | 85% | moderate |
April Weather | 11°C (52°F) | 31 mm (1.2 inches) | 84% | high |
May Weather | 14°C (58°F) | 73 mm (2.9 inches) | 82% | very high |
June Weather | 18°C (66°F) | 74 mm (2.9 inches) | 80% | very high |
July Weather | 20°C (69°F) | 43 mm (1.7 inches) | 73% | very high |
August Weather | 20°C (68°F) | 57 mm (2.3 inches) | 68% | very high |
September Weather | 17°C (62°F) | 46 mm (1.8 inches) | 76% | high |
October Weather | 13°C (55°F) | 73 mm (2.9 inches) | 88% | moderate |
November Weather | 8°C (46°F) | 65 mm (2.5 inches) | 92% | low |
December Weather | 6°C (43°F) | 94 mm (3.7 inches) | 93% | low |