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Illinois United States of America
Temperatures in January
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Temperature in Illinois in January

Illinois is a region in the United States of America. January in has maximum daytime temperatures ranging from very low in Galena with -2°C to low temperatures in Metropolis with 6°C. Nighttime temperatures generally drop to -4°C in Metropolis and -12°C in Galena. The month of January is in the winter season. On average, it is one of the coldest months of the year.

What is the temperature of the different cities in Illinois in January?

Find the average daytime temperatures in January for the most popular destinations in Illinois on the map below. Click on a destination dot for more detailed information.

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 January in Illinois?
    • Data insights from our comprehensive database indicate that Metropolis is the city with the highest warmth. Daytime peaks average near 6°C, while the nights are characterized by a low temperature close to -4°C."

  • What is the coldest city in January in Illinois?
    • In our database, Galena is the chilliest city in January in Illinois. Daytime temperatures typically peak at -2°C, while the nighttime lows hover around -12°C.

  • How much sun does Illinois get in January?
    • Most areas experience a moderate amount of sunshine, with approximately 133 hours of sunlight expected in Chicago. This makes it neither too gloomy nor overly bright.

    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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