Yes, most items can have their due date extended as long as there is not a waiting list on the item.
Items can be renewed by calling the library (507) 304-4010.
You can also renew items yourself by accessing your account online. When logging into your account, type your library card number without the spaces. Your password when your account was set up was the first 8 characters of your last name (for shorter last names, use your whole name).