Harold William Jordam md Thelma Marie Metcalf; 1940; Iowa

I show that Harold William Jordan married Thelma Marie Metcalf on 14 Feb 1940 in Missouri; however, since they were both born and died in Iowa, it seems strange that they would have been married in Missouri.Hoping a family member can give me a correct place of marriage and let me know if the above marriage date is correct.