Temperature in Illinois in December
Illinois is a region in the United States of America. December in has maximum daytime temperatures ranging from very low in Galena with 1°C to low temperatures in Metropolis with 9°C. Nighttime temperatures generally drop to -1°C in Metropolis and -8°C in Galena. During December, winter is in full swing.
What is the temperature of the different cities in Illinois in December?
Explore the map below to discover average December temperatures at the top destinations in Illinois. For a deeper dive, simply click on any destination dot.
Interested in more climate information?
We have much more information about the climate in Illinois.
Interested in the weather conditions in a specific month? Select the month below.
Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.
Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.