 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. Partly cloudy skies overnight with lows around 63. North winds 5 to 10 miles an hour. Mainly sunny skies Wednesday. High temperatures reach up to 81. Mainly clear skies Wednesday night. Lows dip down to about 56. Right now, 68.