Temperatures warmed very nicely on Tuesday with Des Moines tieing their record high for the date of 91 degrees. The heat was accompanied by rather dry air as dew point temperatures were well below 50 degrees. The featured chart presents the dew point temperature by day of the year when an air temperature at or above 90 degrees was observed by the Des Moines weather sensor. Typically, hot weather in Iowa is accompanied by muggy conditions with dew point values well above 60 degrees.