Weather will likely play an important role when you plan your trip to Kathadimattam, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and March with an average temp of 68°F, while the coldest months are January and February with an average of 64°F. The rainiest months in Kathadimattam are October, August, May, and July, with each month seeing an average of 11 inches of rainfall.