Illinois weather in May 2022

  • 21°C maximum daytime temperature in May in Illinois (Chicago)21
    21°C max day temperature
  • 9 hours of sunshine per day
  • 11 days with some rainfall in May in Illinois (Chicago)11
    11 days with some rainfall
  • 9°C minimum night-time temperature in May in Illinois (Chicago)9
    9°C min night temperature
  • 15 hours of daylight per day in May in Illinois (Chicago)15
    15 hours of daylight per day
  • No heat & humidity in May in Illinois (Chicago)0
    No heat & humidity
  • 84 mm monthly rainfall in May in Illinois (Chicago)84
    84 mm of monthly rainfall
  • UV (maximum) index 7 (High) in May in Illinois (Chicago)7
    7 (High) UV index
  • 6°C sea temperature in May in Illinois (Chicago)6
    6°C sea temperature

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

More destinations >>

  • Browse the best deals on hotel stays & compare prices
  • Check lowest rates by month & also by day of the week
  • Search by date or browse hotels by destination & map

Recommended for Illinois

The May 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 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

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

Back to top

More about the USA

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 May sunrise & sunset times

Browse the sunrise and sunset times for Illinois in May 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
Sunday, 1st May 2022 05:47 19:49
Monday, 16th May 2022 05:29 20:05
Tuesday, 31st May 2022 05:18 20:19

Related posts

Popular travel offers

Top ^

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