The best time to visit Yu County is during the spring or autumn months, specifically from April to May or September to October, when the weather is most pleasant for sightseeing.
During these periods, the temperatures are mild and comfortable, making it ideal for exploring the county's historic sites and natural scenery. You'll find it comfortable to walk around the ancient town, visit the various temples, and enjoy the outdoor landscapes without the extremes of summer heat or winter cold.
Couples looking for a romantic and scenic getaway will particularly appreciate autumn. The foliage around the mountains and valleys often turns vibrant shades, providing a beautiful backdrop for walks and photography. The crisp air and clear skies make for excellent conditions to explore the Great Wall sections nearby.
Families travelling with children will find spring an excellent choice. The moderate weather is great for outdoor activities and exploring the ancient town's alleyways without it being too hot or too cold for little ones.