Below is a list of Welton IA zip codes. For your research we have also included Welton Area Code, Time Zone, UTC and the local Clinton County FIPS Code. Each Welton Iowa zip code has a center Longitude / Latitude point (the Welton center is -90.598297119141 / 41.912799835205). For your convenience we have also indicated if that zip code in Welton observes Daylight Savings time.