Chicago weather

Usually in March
- 8
- -2
- 6
Weather by month
Now Today
- 3
- 7
5-day forecast

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Recommended for Illinois

The weather guide for Illinois (Chicago) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

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

When is the best time to go to Chicago?

The best time to go to Chicago is June based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

0.5
Jan
1
Feb
1.5
Mar
1.5
Apr
4
May
5
Jun
4.5
Jul
4.5
Aug
4
Sep
1.5
Oct
0.5
Nov
0
Dec

Change criteria

Max Day Temperature (°C)

-1
Jan
1
Feb
8
Mar
15
Apr
21
May
27
Jun
29
Jul
28
Aug
24
Sep
17
Oct
9
Nov
2
Dec

Hours of Sunshine (daily)

4
Jan
5
Feb
6
Mar
7
Apr
9
May
10
Jun
10
Jul
9
Aug
8
Sep
6
Oct
4
Nov
3
Dec

Best time to go for the weather

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

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

More about the USA

Which is the hottest month in Chicago?

The hottest time of year in Chicago is normally July. Expect maximum daytime temperatures to reach 29°C with moderate heat and humidity.

Which month has the most rain in Chicago?

In terms of rainfall, July is usually the wettest month in Chicago with 100mm on average. There are normally 10 days in July with some rain.

When is it sunniest in Chicago?

The sunniest time of year in Chicago is normally July with bright sunshine on average for 69% of daylight hours; that's 10 hours of sunshine per day.

When is the sea warmest in Chicago?

The sea is usually at its warmest in Chicago in August when the water temperature reaches 21°C.

What is the flight time to Illinois from the UK?

The flight time to Illinois from the UK is typically 8.5 hours.

What is the time difference between Illinois and the UK?

The time difference between Illinois and the UK is GMT-6 hours.

What is the main language spoken in Illinois?

The main language spoken in Illinois is English.

Learn a language for Illinois with Busuu^*, Lingoda^* and Rocket Languages^*.

What is the currency in Illinois?

The currency in Illinois is the US Dollar (USD).

Send money to Illinois with Monito^*, Wise^* and World Remit^*.

Which plugs are used in Illinois?

Illinois uses electrical plug type A + B (120 Volts).

Which side of the road do they drive on in Illinois?

They drive on the right side of the road in Illinois.

Do you need a visa for Illinois?

Yes, UK passport holders do need a visa to enter Illinois.

Check USA visa requirements for all passport holders with VisaHQ^* and iVisa.com^*.

Compare Chicago weather with the USA

Below the Chicago weather chart shows average maximum daytime temperature for Chicago, Illinois, USA and the USA (Washington).

Maximum daytime temperature (°C)

Chicago, Illinois, USA

USA (Washington)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

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