When considering the best time to visit Tiruvannamalai, the most favorable period is generally from October to March. During these months, the weather is pleasant, offering cooler temperatures and lower humidity, which is ideal for exploring the town and its spiritual sites.For travelers interested in comfortable exploration, the months of November, December, and January stand out. The daytime temperatures are mild, typically ranging from 20°C to 30°C (68°F to 86°F), making it comfortable to visit the Arunachaleswarar Temple, climb the sacred Arunachala Hill, and participate in the Girivalam (circumambulation) ritual. The evenings are also cooler, providing a pleasant environment for walks and outdoor activities.Those planning to attend the Karthigai Deepam festival, a significant spiritual event, should aim for late November or early December. This festival is a major draw, attracting pilgrims and visitors from around the world to witness the lighting of the colossal lamp on Arunachala Hill. While this period is busier, the spiritual energy and cultural experience are unparalleled.