The best time to go to Le Thillay is generally during the spring (April to May) and autumn (September to October) months when the weather is mild and pleasant.During spring, the countryside around Le Thillay, including the nearby Parc Naturel Régional Oise-Pays de France, begins to bloom. Temperatures are comfortable for exploring the local villages and enjoying outdoor activities without the summer crowds. It's a good time for those who appreciate scenic walks or cycling.Autumn also offers agreeable weather, with cooler temperatures and the beautiful colours of the changing leaves. This period is ideal for visitors who prefer a quieter experience and want to explore the historical sites in the region, such as the Château de Chantilly, without the peak season rush.