Weather will likely play an important role when you plan your trip to Arcabuco, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and January with an average temp of 55°F, while the coldest months are August and September with an average of 54°F. The rainiest months in Arcabuco are April, November, March, and May, with each month seeing an average of 8 inches of rainfall.