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Illinois weather in December 2024
Expect 2°C daytime maximum temperatures in the shade with on average 3 hours of sunshine per day in Illinois in December. Check more long-term weather averages for Illinois in December before you book your next holiday to Illinois in 2024/2025.
- 22°C max day temperature
- 3 hours of sunshine per day
- 1212 days with some rainfall
- -7-7°C min night temperature
- 99 hours of daylight per day
- 0No heat & humidity
- 6262 mm of monthly rainfall
- 11 (Low) UV index
- 55°C sea temperature
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Recommended for Illinois
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.
Top Illinois destinations
Below are average maximum temperatures at popular countries, regions and places in Illinois in December. Select a holiday destination to see more weather parameters.
All Illinois destinations
Metric (°C / mm) | Imperial (°F / inches)
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 2024. 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 |
---|---|---|
Sunday, 1st December 2024 | 06:59 | 16:20 |
Monday, 16th December 2024 | 07:12 | 16:21 |
Tuesday, 31st December 2024 | 07:18 | 16:30 |
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