Weather will likely play an important role when you plan your trip to Chinandega, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually March and April with an average temp of 84°F, while the coldest months are December and January with an average of 81°F. The rainiest months in Chinandega are October, September, June, and August, with each month seeing an average of 16 inches of rainfall.