The best time to visit Sundsvall is during the summer months, from June to August, when the weather is at its warmest and the days are long.During this period, you'll experience average temperatures ranging from 15°C to 22°C, making it ideal for exploring the city's outdoor attractions and the surrounding natural beauty. The extended daylight hours, with the sun setting very late, provide ample time for sightseeing and enjoying activities like boat trips in the archipelago or hiking in the nearby forests. This is also when most local festivals and outdoor events take place, adding to the lively feel of the city.For those interested in winter sports or experiencing a traditional Swedish winter wonderland, late January to March is an excellent alternative. While temperatures are much colder, often below freezing, this period offers reliable snow conditions for skiing, snowboarding, and ice skating.