You will need a warm jacket and an umbrella in the winter. You can bring them or buy them here. Many students prefer to buy these things after they arrive because it's more convenient for them. The prices of these items in the U.S. may also be lower than in some other countries. Casual clothing is OK for class.
Many students wear jeans.
Again, you may want to buy most of your clothing after you arrive. There are several occasions during the year when international students have an opportunity to wear the traditional clothing of their countries. You may want to bring one such outfit. Please do not bring a large quantity of cash. If you plan to drive a car while you are staying in the U.S., you should get an International Driver's License.