Planning for the weather is a good way to make your trip to Karaikal relaxing and enjoyable, especially when you’re splurging. The hottest months are usually May and June with an average temp of 86°F, while the coldest months are January and February with an average of 79°F. The rainiest months in Karaikal are November, October, December, and August, with each month seeing an average of 10 inches of rainfall.