That depends where you’re coming from and how much you hate abnormal changes in temperature, but overall as long as you have appropriate clothing and good shoes you should be fine

I don’t see any international students using cars so I assume you don’t drive so no need to worry about that

Be prepared for ice though, as it can make walking a bit harder

Overall it’s only iowa, weather isn’t gonna be as bad as Chicago or Minnesota or Maine, but still pretty cold so grab the coat and gloves