Your morning Illinois weather update Frost advisories are blanketing much of Illinois this morning, with temperatures dipping into the lower 30s across northern and central regions. With 60 weather alerts currently active statewide, including flood warnings and widespread frost advisories, it's a morning that demands extra attention before heading out the door. Right now at 5 A.M., we're sitting at 41 degrees, but don't let that fool you – many outlying areas are experiencing frost-forming temperatures in the lower to middle 30s.