Guyancourt Weather in December

December in Guyancourt brings low temperatures, with daytime highs of 9°C (48°F) and nights around 2°C (36°F). It's also the wettest month of the year, so an umbrella is a must.

Rainfall in Guyancourt in December

Given that this is the rainiest month, it's wise to carry an umbrella to stay dry during unexpected showers. Historically, the month has about 16 days of rain, averaging 74 mm (2.9 in) in total. This is a month with many wet days but modest rainfall totals, so showers are generally light and easy to manage.

Temperature in Guyancourt in December

Daytime highs in Guyancourt in December reach 9°C (48°F), with nights around 2°C (36°F). Winter occurs in December. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. With lows around 2°C (36°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Guyancourt in December

With limited sunshine this month, there are about 58 hours of sun. It's ideal for those who prefer a cooler, cloudier climate.

December in Guyancourt has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.