Symptoms of an allergic reaction which may require medical intervention include: 1  Swelling or angioedema of the face, throat, tongue, lips, eyes, hands, feet, ankles, or lower legs. 2  Hoarseness. 3  Difficulty breathing or swallowing. 4  Rash or hives. 5  Abdominal pain.
Averages for Chicago in December. December in Chicago is winter and this means an extremely cold climate that can be subject to icy winds and snow. Make sure you layer up your clothes with a warm coat over the top, as winter in Chicago can be brutal. If you're not one for cold weather, Chicago is a city to be avoided in January! Read more.
In the winter, the Chicago climate in December, January and February can be particularly cold, with some icy days and harsh winds. This is also the wettest time of the year, and snow often also falls in the winter.