Taking into account the local weather in Angostura is an important factor for planning your visit, especially if you plan to spend your trip poolside. 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.