Sondrio is generally safe for female solo travelers. Like most Italian cities, the town has a low crime rate and the locals are usually warm and hospitable. However, always remember to stay cautious and be aware of your surroundings, especially at night. On your travels, always adhere to basic safety precautions like not sharing your accommodation details with strangers and not flashing expensive belongings in public. This holds true for any place you visit - safety first!