We have seen little precipitation over much of Illinois in the first half of July. The map below shows that much of the state has received less than an inch of precipitation. The only area with significant precipitation is along and south of Interstate 70 with amounts of 2 to 5 inches.
It is not a major concern yet given the wet conditions in May and June. In fact, if you look at the precipitation departures for the last 90 days ending on July 16 (second map), you see that much of the state remains 1 to 12 inches above the 1981-2010 average.
According to the National Weather Service, the next chance for significant precipitation is this weekend as a cold front pushes through the state. This should trigger rain ahead of it and give some relief from the heat and humidity of this week.