Primarily, a pilgrimage site and tourist destination in Tamilnadu, Thiruvannamalai is best to visit in between the month of November and March, i.e., the winter season. The summer season, on the other hand, is inclined to hot and dry weather whereas, in the monsoon months, the town receives a heavy rainfall. This makes the two seasons not quite ideal to visit the town.
The months of summer season in Thiruvannamalai are mainly from March to May. During this time the temperature varies from 26°C to 41°C. Due to hot and dry weather, it becomes difficult to visit Thiruvannamalai in summer.
Monsoon in Thiruvannamalai commences in the month of June and ends in September. Heavy rainfall makes the town energetic and livelier in monsoon, though it can sometimes be a bit inconvenient for sightseeing tour. Therefore, before planning a visit in monsoon season, it is advised to check the weather forecast for alerts on heavy rain.
The town welcomes the winter season in the month of December and lasts until March. Throughout these months, Thiruvannamalai experiences a pleasant weather with a recorded maximum temperature of 30°C. Thus, the winter season is best to visit Thiruvannamalai.