- Save up to 15% on Avis car hire for Canada
- Offer available at participating locations in Canada
- Avis discount code excludes Car Group X
- Blackout periods may apply
Illinois weather in December 2020
Get the latest coronavirus (COVID-19) updates for the USA with current travel advice, statistics and online resources.
Below are average maximum temperatures at popular destinations in Illinois in December. Select a destination to see more weather parameters.
The December weather guide for Illinois 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.
Recommended for Illinois
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 sunrise & sunset times for December 2020
Browse the sunrise & sunset times for Illinois in December 2020. Select a month to view Illinois sunrise & sunset times for the next twelve months. The Illinois sunrise & sunset times shown below are for Chicago.
|Date||Sunrise times||Sunset times|
|Tuesday, 1st December 2020||06:59||16:20|
|Wednesday, 16th December 2020||07:12||16:21|
|Thursday, 31st December 2020||07:18||16:30|
- Save on flights to Canada, USA & the rest of the Americas
- Book online for low fares with Air Canada
- Fly to Toronto, Vancouver, New York, Cancun & more
Metric (°C / mm) | Imperial (°F / inches)
Discover more about the USA
More Illinois destinations
Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers
We promise not to share your details
Popular travel offers
*affiliate links: find out how we are funded and why this helps us remain free to use.