Illinois weather in May 2020

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

More destinations >>

  • Top deals & discounts
  • Illinois weather overview
  • Illinois climate averages by month
  • More destinations
  • Best time to go to Illinois
  • Illinois 5-day weather forecast

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The May 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.

  • Save up to 40% with ALL-Accor Live Limitless membership
  • Receive EXTRA up to 10% discount with first booking
  • Earn reward points, get members' rates, discounts & more

How hot is it in Illinois in May?

Daytime temperatures usually reach 21°C in Chicago, Illinois in May, falling to 9°C at night.

How sunny is it in Illinois in May?

There are normally 9 hours of bright sunshine each day in Chicago, Illinois in May - that's 62% of daylight hours.

Is the sea cold around Illinois in May?

The average sea temperature around Chicago, Illinois in May is 6°C.

Does it rain in Illinois in May?

There are usually 11 days with some rain in Chicago, Illinois in May and the average monthly rainfall is 84mm.

Illinois sunrise & sunset times for May 2020

Browse the sunrise & sunset times for Illinois in May 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
Friday, 1st May 2020 05:46 19:50
Saturday, 16th May 2020 05:29 20:06
Sunday, 31st May 2020 05:18 20:19
  • Book Alamo Gold in the USA & get FREE additional driver
  • Prepay online & save up to £45 a week
  • Alamo Gold is only available to UK residents

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

Back to top

Discover more about the USA

More Illinois destinations

More destinations & map >>

Related posts

Popular travel offers

Top ^

*affiliate links: find out how we are funded and why this helps us remain free to use.