After a beautiful and warm Sunday, things will start to change come Tuesday. For Monday, though, sunshine will warm temperatures into the upper 50's. By Tuesday, clouds will be on the increase out ahead of an area of low pressure as high pressure pushes to our east. By Tuesday evening, showers become increasingly likely. The showers will be around through the night Tuesday and through the day Wednesday. At times, moderate to briefly heavy rain is possible as low pressure looks to push right overhead. That could also support some thunder and lightning in spots with the rainfall.
Not only will it be rainy on Wednesday, but temperatures will struggle to reach the lower 50's and winds will be blustery. By the time all is said and done, rainfall totals could eclipse 1" in many backyards. In fact, some locations could easily see 1.5-2" if some heavy rain does make its way through the region. The good news is we do need some rainfall here in northern Illinois. The bad news is the rain will create for quite the raw day on Wednesday.