Cossonay Weather & Climate: Best Time to Visit

In Cossonay, temperatures differ significantly between summer and winter months. Average daytime temperatures reach a comfortable 24°C (75°F) in July. In January, the coolest month of the year, temperatures drop to a chilly 5°C (41°F).

At night, temperatures range from around 15°C (59°F) in July to -1°C (30°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Cossonay experiences significant rain/snowfall throughout the year, averaging 1507 mm (59 in) of precipitation annually. Despite minor fluctuations, Cossonay enjoys fairly consistent precipitation throughout the year. In July, you can expect around 144 mm (5.7 in) of precipitation, while in March, Cossonay receives about 108 mm (4.3 in). For more details, please visit our Cossonay Precipitation page.

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

The average number of days each month with precipitation

Cossonay can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 8.6 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 1.9 hours of sunlight per 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 Cossonay.

The city experiences its highest humidity in January, reaching 78%. In July, the humidity drops to its lowest level at 65%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year