Planning for the weather is a good way to make your trip to Sundar relaxing and enjoyable, especially when you’re splurging. The hottest months are usually May and August, with an average temperature of 26°C, while the coldest months are February and March, with an average of 25°C. The rainiest months in Sundar are November, December, January and March, with each month seeing an average of 448 mm of rainfall.