Understand that when running in rain no clothing products will keep runners completely dry. Although it may be a difficult day to do focused training, enjoying your run is still possible. Try just to have fun running in the rain. Exercise caution when running in lightning storms. Consider slipping in a rest day or heading to the gym for a cross training workout on these days.
Blisters can occur in any weather.
However, when summer finally hits Chicago and long runs are more enjoyable, blisters can take all the fun out of an otherwise enjoyable sport. Some things can be done to help prevent them. First, make sure shoes are fitted properly. Allow enough room in the toe box for toes to move around comfortably. Remember that feet become hot and moist during a run and this causes swelling.