Weather is probably a major factor when you plan your trip to Angostura, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually September and January with an average temp of 60°F, while the coldest months are January and February with an average of 59°F. The rainiest months in Angostura are May, April, October, and November, with each month seeing an average of 22 inches of rainfall.