The best time to visit Nivelles is during the spring (April to June) and early autumn (September to October) when the weather is pleasant and comfortable for exploring.During spring, the days are getting longer, and the temperatures are mild, typically ranging from 10°C to 20°C. This period is ideal for enjoying outdoor activities, such as walking around the town centre or visiting the Nivelles Collegiate Church without the heat of summer. You'll also find the local parks and gardens in full bloom, offering lovely scenery.Early autumn also offers agreeable weather, with temperatures similar to spring, usually between 10°C and 18°C. The summer crowds have thinned out, making it a more peaceful time to experience Nivelles. The changing colours of the leaves in the surrounding countryside provide a picturesque backdrop for day trips.While July and August are also popular due to warmer temperatures (often 20°C to 25°C), this is peak tourist season, meaning more visitors and potentially higher prices for accommodation and flights.