 Now, from your 24-hour weather station, here's Southern Iowa's most accurate forecast on Ottumwa Radio. I'm meteorologist Megan Mulford with a look at your forecast. Mainly cloudy skies overnight with lows around 60. Southeasterly winds at around 5 miles an hour. Highest 79, Saturday, slight chance for showers. Cloudy Saturday night, slight chance of rain showers, 63. Currently, 66.