Front Street Mfg. LLC - Rain gutter accessories for the home owner, as well as some useful tips on rain gutter problems. Weather Underground: Barnes City, Iowa, Forecast - Active advisories, if any. Current conditions, forecast, local radar and satellite. Wikipedia: Barnes City, Iowa - Encyclopedia article covers geography and demographics of this community in Mahaska County. City-Data. com: Barnes City, Iowa - Profiles housing, population demographics, jobs, weather and climate tables. Includes a list of area hospitals, schools, airports, radio and TV broadcast stations, photographs and maps. AccuWeather: Barnes City, IA - Fifteen-day weather forecast, wind chill or heat index, National Weather Service forecast for the surrounding area. Barnes City Street Map - Closeup view of Barnes City. Interactive.