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August weather forecast in Chicago

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

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

Sun

Sunday

Mon

Monday

Tue

Tuesday

Wed

Wednesday

Thu

Thursday

Fri

Friday

Sat

Saturday

27 July, sun

	744 mmHg		71%
	5.2 m/s		+22

27 July, Sunday. day, 27°; night, 21°; partly cloudy

28 July, mon

	744 mmHg		72%
	5.2 m/s		+22

28 July, Monday. day, 27°; night, 21°; rain

29 July, tue

	745 mmHg		71%
	5.1 m/s		+22

29 July, Tuesday. day, 27°; night, 20°; rain

30 July, wed

	745 mmHg		70%
	4.4 m/s		+22

30 July, Wednesday. day, 27°; night, 20°; clear

31 July, thu

	745 mmHg		69%
	4.5 m/s		+22

31 July, Thursday. day, 28°; night, 20°; clear

1 August, fri

	745 mmHg		70%
	4.6 m/s		+22

1 August, Friday. day, 28°; night, 21°; clear

2 August, sat

	745 mmHg		70%
	4.9 m/s		+22

2 August, Saturday. day, 28°; night, 21°; clear

3 August, sun

	745 mmHg		72%
	4.69 m/s		+22

3 August, Sunday. day, 28°; night, 21°; clear

4 August, mon

	745 mmHg		72%
	4.69 m/s		+22

4 August, Monday. day, 27°; night, 21°; partly cloudy

5 August, tue

	746 mmHg		72%
	5.2 m/s		+22

5 August, Tuesday. day, 27°; night, 20°; overcast

6 August, wed

	745 mmHg		71%
	4.8 m/s		+22

6 August, Wednesday. day, 27°; night, 20°; rain

7 August, thu

	745 mmHg		72%
	4.8 m/s		+23

7 August, Thursday. day, 27°; night, 20°; rain

8 August, fri

	745 mmHg		71%
	5 m/s		+23

8 August, Friday. day, 27°; night, 21°; rain

9 August, sat

	745 mmHg		71%
	5 m/s		+22

9 August, Saturday. day, 27°; night, 20°; partly cloudy

10 August, sun

	744 mmHg		73%
	5.2 m/s		+23

10 August, Sunday. day, 27°; night, 20°; rain

11 August, mon

	745 mmHg		72%
	4.9 m/s		+23

11 August, Monday. day, 26°; night, 20°; clear

12 August, tue

	745 mmHg		73%
	4.8 m/s		+23

12 August, Tuesday. day, 26°; night, 20°; clear

13 August, wed

	745 mmHg		72%
	4.69 m/s		+22

13 August, Wednesday. day, 26°; night, 20°; partly cloudy

14 August, thu

	745 mmHg		72%
	5 m/s		+22

14 August, Thursday. day, 26°; night, 19°; partly cloudy

15 August, fri

	745 mmHg		72%
	4.8 m/s		+22

15 August, Friday. day, 26°; night, 19°; clear

16 August, sat

	745 mmHg		71%
	4.9 m/s		+22

16 August, Saturday. day, 27°; night, 20°; clear

17 August, sun

	745 mmHg		72%
	4.9 m/s		+22

17 August, Sunday. day, 26°; night, 20°; rain

18 August, mon

	745 mmHg		74%
	4.8 m/s		+22

18 August, Monday. day, 26°; night, 20°; rain

19 August, tue

	745 mmHg		74%
	5 m/s		+22

19 August, Tuesday. day, 25°; night, 19°; rain

20 August, wed

	745 mmHg		73%
	5 m/s		+22

20 August, Wednesday. day, 26°; night, 20°; rain

21 August, thu

	745 mmHg		72%
	4.8 m/s		+22

21 August, Thursday. day, 26°; night, 19°; clear

22 August, fri

	746 mmHg		73%
	5.1 m/s		+22

22 August, Friday. day, 26°; night, 20°; rain

23 August, sat

	746 mmHg		72%
	4.9 m/s		+22

23 August, Saturday. day, 26°; night, 19°; clear

24 August, sun

	745 mmHg		73%
	5.2 m/s		+22

24 August, Sunday. day, 27°; night, 20°; clear

25 August, mon

	745 mmHg		73%
	5.5 m/s		+21

25 August, Monday. day, 26°; night, 20°; overcast

26 August, tue

	746 mmHg		74%
	4.8 m/s		+21

26 August, Tuesday. day, 26°; night, 20°; overcast

27 August, wed

	745 mmHg		75%
	5.1 m/s		+21

27 August, Wednesday. day, 27°; night, 20°; partly cloudy

28 August, thu

	745 mmHg		74%
	5.5 m/s		+21

28 August, Thursday. day, 27°; night, 20°; rain

29 August, fri

	745 mmHg		75%
	5.2 m/s		+21

29 August, Friday. day, 26°; night, 20°; rain

30 August, sat

	746 mmHg		73%
	5.1 m/s		+21

30 August, Saturday. day, 25°; night, 19°; clear

31 August, sun

	746 mmHg		71%
	5.1 m/s		+21

31 August, Sunday. day, 26°; night, 19°; clear

1 September, mon

	746 mmHg		72%
	4.9 m/s		+22

1 September, Monday. day, 26°; night, 19°; clear

2 September, tue

	746 mmHg		70%
	5 m/s		+21

2 September, Tuesday. day, 26°; night, 19°; clear

3 September, wed

	746 mmHg		70%
	5.2 m/s		+21

3 September, Wednesday. day, 26°; night, 19°; clear

4 September, thu

	746 mmHg		71%
	5.1 m/s		+21

4 September, Thursday. day, 25°; night, 19°; rain

5 September, fri

	747 mmHg		70%
	5.3 m/s		+21

5 September, Friday. day, 25°; night, 18°; clear

6 September, sat

	746 mmHg		70%
	5.7 m/s		+21

6 September, Saturday. day, 26°; night, 19°; partly cloudy

Average data for 10 years

Chicago August

12

sunny days

11

days with precipitation

5

cloudy days

12 sunny days; 11 days with precipitation; 5 cloudy days;

72

%

air humidity

3.3

m/s

WindS

93

mm of precipitation

(10% of annual average)

+22

°C

Water temperature

air humidity 72%; 93 millimeters of precipitation (10% of annual average); Wind southerly 3.3 Meters per second; Water temperature +22°

Weather graphs for August

TemperatureWater temperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

S

S

S

S

S

S

S

S

S

S

S

S

S

SE

S

S

S

S

SE

S

S

S

S

S

S

S

SE

SE

SE

SE

SE

1

Average data for 10 years

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Daytime temperature

Night-time temperature

Cities near you

Indianapolis
Michigan City
Wisconsin Dells
Appleton
Dixon
Ottawa
Iowa City
Washington
Sidney

Cities with similar weather in August

Suhum
Batumi
Heraklion
Varna
Podgorica
The Golden Sands
Hersonisos
Kobuleti
Victoria

The weather forecast for August 2025 is based on historical data from the past 10 years.

In August, the weather in Chicago is typically warm. Average daily high temperature in August is about 26 degrees above zero. On average, Chicago has 12 sunny, 11 rainy, 5 partly cloudy, and 3 cloudy days in August. The rains are usually heavy.

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