The Dominican Republic is a beautiful country located in the Caribbean Sea. September is a great time to visit the Dominican Republic because the weather is perfect for spending time on the beach. The average temperature in September is around 27 degrees Celsius, which makes it the perfect time to enjoy the sun and the sea. There are many things to do in the Dominican Republic, such as visiting the capital city of Santo Domingo, exploring the rainforest, or going on a safari. Regardless of what you decide to do, you are sure to have a great time in the Dominican Republic in September.