It may be a bit early to gather this information, but I will start.
Based on information from weather.com, the forecast high, forecast low, general forecast and chance of precipitation as of 7/8/15 is as follows:
Pittsburgh, 7/15, 86, 66, am showers, 30%
Pittsburgh, 7/16, 86, 67, scattered thunderstorms, 50%
Chicago, 7/17, 82, 70, partly cloudy, 20%
St. Paul, 7/17, 87, 67, partly cloudy, 20%
St. Paul, 7/18, 85, 65, mostly sunny, 20%
St. Paul, 7/19, 85, 65, partly cloudy, 20%
Chicago, 7/19, 81, 67, partly cloudy, 20%
Chicago, 7/20, 80, 68, isolated thunderstorms, 30%
Chicago, 7/21, 80, 68, scattered thunderstorms, 40%
Edited by pennyk, 08 July 2015 - 05:19 PM.