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Illinois United States of America
Temperatures in December
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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.

Weather conditions Weather
Temperatures
Precipitation
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Legend very warm warm pleasant moderate cold very cold
Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

  • What is the warmest city in December in Illinois?
    • From a thorough analysis of our records, Metropolis clearly dominates in terms of high temperatures. The city witnesses daytime temperatures hovering around 9°C, and evenings that remain near -1°C.

  • What is the coldest city in December in Illinois?
    • Our database indicates that in December, Galena is the city with the coolest temperatures in Illinois. You can expect daytime highs of 1°C and nighttime lows close to -8°C.

  • How much sun does Illinois get in December?
    • The city Chicago usually sees around 107 hours of sunlight, indicating a moderately sunny period.

    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.

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