The city of Chicago is headed for a stretch of notably warm weather, extending the feel of summer further toward the edge of autumn. As we delve into the heart of the week, the National Weather Service’s forecast anticipates “sunny” skies with an agreeable high near 77 degrees and gentle breezes moving from the east-northeast throughout the morning hours. The forecast details a shift to “clear” conditions tonight, dipping to a comfortable low around 63 degrees.