Illinois weather in January
Thinking about venturing to Illinois this January and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:
What is the weather like in Illinois in January?
Illinois is a region in the United States of America. January in Illinois generally has temperatures that range from very cold to cold, with precipitation levels ranging from low to moderate. During January, winter is in full swing.
Based on our climate data spanning from 1990-2020, the average maximum temperature is very cold in Galena at -2°C to cold in Metropolis at 6°C. Nighttime temperatures generally drop to -4°C in Metropolis and -12°C in Galena. On average, January is the coldest month of the year in Illinois. So be prepared and make sure to pack winter cloths.
In January, precipitation varies across different areas. From low snowfall in Galena with an average of 27 mm to moderate snowfall in Metropolis with 100 mm. Going by our weather data, this month in Chicago usually has the least rain, making it the driest month of the year. Most cities enjoy a balanced amount of sunshine, with around 133 hours of sunlight anticipated in Chicago. This ensures the days are neither too dim nor excessively sunny.
To learn more about the conditions in specific areas of Illinois in January, check out the map below. For more details on the yearly weather, visit our Illinois climate page.
Where to go in Illinois in January
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Popular destinations in Illinois
What is the weather like in January for the 5 most popular destinations in Illinois?
Average weather in Chicago
In January Chicago generally has very low temperatures with maximum daytime temperatures around -1°C, minimum nighttime temperatures around -9°C and moderate monthly snowfall. So on average the conditions are poor that month.
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Average weather in Schaumburg
In January Schaumburg generally has very low temperatures with maximum daytime temperatures around -1°C, minimum nighttime temperatures around -10°C and moderate monthly snowfall. So on average the conditions are poor that month.
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Average weather in Rosemont
In January Rosemont generally has very low temperatures with maximum daytime temperatures around -0°C, minimum nighttime temperatures around -9°C and moderate monthly snowfall. So on average the conditions are poor that month.
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Average weather in Joliet
In January Joliet generally has very low temperatures with maximum daytime temperatures around -0°C, minimum nighttime temperatures around -9°C and moderate monthly snowfall. So on average the conditions are poor that month.
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Average weather in Naperville
In January Naperville generally has very low temperatures with maximum daytime temperatures around -1°C, minimum nighttime temperatures around -10°C and moderate monthly snowfall. So on average the conditions are poor that month.
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Is your destination not in the list? Have a look at other destinations in Illinois, in the United States of America.
Is January the best time to visit Illinois?
Given the typically poor weather conditions in Chicago, January may not be the ideal time to visit Illinois.
On average, the best time to visit Illinois is in September with generally perfect weather in Chicago. On the other hand, the weather in January, February, March, November and December tend to be poor.
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 climate conditions. Find out where to go with our weather planner.