Les Ulis Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from comfortable to chilly in Les Ulis. On average, daytime temperatures range from a comfortable 26°C (79°F) in August to a chilly 8°C (46°F) in January.

Nighttime temperatures range from 14°C (57°F) in August to 2°C (36°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, Les Ulis has a moderate amount of precipitation, averaging 737 mm (29 in) of rain/snowfall annually. The wettest period in Les Ulis occurs in December, which receives around 73 mm (2.9 in) of precipitation. During the driest month, September, Les Ulis experiences moderate rainfall, totaling 53 mm (2.1 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Les Ulis Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

In Les Ulis, summer days are longer and more sunny, with daily sunshine hours peaking at 7.5 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 1.9 hours per average day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Les Ulis.

The city experiences its highest humidity in November, reaching 84%. In April, the humidity drops to its lowest level at 69%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year