The best time to go to Chełmża is during the summer months, from June to August, when the weather is warm and sunny, making it ideal for outdoor activities.During these months, the average temperatures range from 20°C to 25°C (68°F to 77°F), which is superb for enjoying Chełmża Lake. Visitors can take boat trips, swim, or simply relax by the water. The longer daylight hours also allow for more exploration of the town's historical sites, such as the Chełmża Cathedral.Couples looking for a relaxing getaway will appreciate the pleasant summer evenings, which are superb for strolling along the lake promenade or dining at one of the local restaurants.