The best time to visit Varanasi is during the winter months (November to February). Although it gets fairly cold during the winters, this is the best time when you can explore the holy city without getting tired. The average low temperature is around 5°C.
The temple opens its gates for the devotees at 2:30 am, when the ‘Mangala Aarti’ is performed, which is a treat to watch. So, if you plan to witness this aarti, you should get up early, take a bath and be there at that time. In case, you are not keen to attend the aarti, then the best time to visit the temple is at 7 AM, to avoid long queues.