The best time to visit Lang Son is during the dry season, from October to April, when the weather is generally pleasant and rainfall is minimal.October and November offer cooler temperatures, making it comfortable for exploring the city and its surrounding natural attractions. This period is ideal for those who enjoy outdoor activities like hiking and sightseeing without the intensity of tropical humidity. You'll find the landscapes lush but not overly damp, great for photography.For travellers looking to avoid the colder months, March and April are also excellent. Temperatures begin to rise, but it's still relatively dry and sunny, before the summer heat and monsoon rains arrive. This shoulder season provides a good balance of comfortable weather and fewer crowds compared to peak tourist times in other regions. It's a great time for couples to enjoy a relaxed trip, perhaps visiting the historical sites or exploring the local markets.