The best time to visit Hannover is during the spring and summer months, from May to September, when the weather is generally pleasant and the city hosts a variety of outdoor events.During these months, you can expect warmer temperatures and longer daylight hours, making it ideal for exploring Hannover's parks, gardens, and outdoor attractions. The famous Herrenhausen Gardens are particularly beautiful in full bloom during this period, offering a wonderful experience for those who appreciate horticulture and grand landscapes.July and August are popular for visitors who enjoy a lively option, as the city often hosts festivals and open-air concerts. For instance, the Maschsee Lake Festival, usually held in August, transforms the area around the lake into a bustling hub of food stalls, music, and entertainment, superb for families and couples looking for a recreational holiday.If you prefer slightly cooler weather and fewer crowds, May, June, and September are excellent choices. These months still offer comfortable temperatures for sightseeing and outdoor activities, and you might find the city a bit more relaxed.