Cossonay Sunshine Hours by Month

To truly understand a climate, we must look at its sunshine. This page shows the total number of hours of direct sunlight per month and the average hours per day in Cossonay, Vaud, Switzerland. These values are calculated using 30 years of data (1990–2020) to ensure accuracy.

Monthly hours of sunshine

Sunshine in Cossonay varies greatly throughout the year. The sunniest month, July, reaches an impressive 257 hours, while December, the darkest month, offers only 57 hours. The total annual amount of sun is 1947 hours.

Daily hours of sunshine

In Cossonay, summer days are longer and more sunny, with daily sunshine hours peaking at 8.6 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 day.

Average percent of sunshine

On average the sun shines 59% of the time during the day in July, the highest percentage of any month. December has the lowest percentage at 26%.

Cossonay enjoys an average of 1947 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

In Lisbon, Portugal, there are approximately 2801 hours of sunshine annually, highlighting its warm and sunny Mediterranean climate.

In contrast, Reykjavík, Iceland, receives only about 1330 hours of sunshine per year, known for its frequently overcast and rainy skies.

In Seoul, South Korea, there are approximately 2133 hours of sunshine per year, mostly during spring and autumn.

Adelaide, Australia, enjoys 2770 hours of sunshine annually, with long, sunny summers.

July, Cossonay’s wettest month, receives 144 mm (5.7 in) of rainfall and has a maximum daytime temperature of 24°C (75°F). During the driest month March you can expect a temperature of 10°C (50°F).

For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Cossonay Precipitation page.