Plan your trip to the beach with a look at year-round temperatures in La Manzanilla de la Paz: The hottest months are usually May and April with an average temp of 73°F, while the coldest months are January and December with an average of 66°F. The rainiest months in La Manzanilla de la Paz are September, August, June, and July, with each month seeing an average of 7 inches of rainfall.