Here are the low temperatures reported this morning across Illinois from the National Weather Service office in Lincoln. A few areas in western and far southern Illinois escaped freezing temperatures but not the rest of the state. So that means the 2013 growing season has officially ended in many places. Unprotected annuals are probably done and the perennials will start to close up shop soon.
And now there are reports of snow across northern Illinois, including at the airports at Moline, De Kalb, Rockford and O’Hare. You can see pictures on the Facebook page for NWS Chicago. [I forgot to mention that soil temperatures around the state are still quite warm, generally in the 50s, so the snow is not expected to last long - see the second map with 4 inch soil temperatures under grass].