Illinois weather in December 2022

  • 2°C maximum daytime temperature in December in Illinois (Chicago)2
    2°C max day temperature
  • 3 hours of sunshine per day
  • 12 days with some rainfall in December in Illinois (Chicago)12
    12 days with some rainfall
  • -7°C minimum night-time temperature in December in Illinois (Chicago)-7
    -7°C min night temperature
  • 9 hours of daylight per day in December in Illinois (Chicago)9
    9 hours of daylight per day
  • No heat & humidity in December in Illinois (Chicago)0
    No heat & humidity
  • 62 mm monthly rainfall in December in Illinois (Chicago)62
    62 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Illinois (Chicago)1
    1 (Low) UV index
  • 5°C sea temperature in December in Illinois (Chicago)5
    5°C sea temperature

Below are average maximum temperatures at popular destinations in Illinois in December. Select a destination to see more weather parameters.

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The December weather guide for Illinois (Chicago) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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Metric (°C / mm)  |  Imperial (°F / inches)

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More about the USA

How cold is it in Illinois in December?

Daytime temperatures usually reach 2°C in Chicago, Illinois in December, falling to -7°C at night.

How sunny is it in Illinois in December?

There are normally 3 hours of bright sunshine each day in Chicago, Illinois in December - that's 37% of daylight hours.

Is the sea cold around Illinois in December?

The average sea temperature around Chicago, Illinois in December is 5°C.

Does it rain in Illinois in December?

There are usually 12 days with some rain in Chicago, Illinois in December and the average monthly rainfall is 62mm. Rain may fall as snow in this month.

Illinois December sunrise & sunset times

Browse the sunrise and sunset times for Illinois in December 2022. Select a month to view Illinois sunrise and sunset times for the next 12 months. The Illinois sunrise and sunset times shown below are for Chicago.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st December 2022 06:59 16:20
Friday, 16th December 2022 07:12 16:21
Saturday, 31st December 2022 07:18 16:29

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