Weather will likely play an important role when you plan your trip to Itahari, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and May with an average temp of 84°F, while the coldest months are January and December with an average of 68°F. The rainiest months in Itahari are July, August, June, and September, with each month seeing an average of 16 inches of rainfall.