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August weather forecast in Sioux City

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

	731 mmHg		71%
	5.3 m/s

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

28 July, mon

	731 mmHg		71%
	5 m/s

28 July, Monday. day, 29°; night, 20°; partly cloudy

29 July, tue

	732 mmHg		70%
	4.6 m/s

29 July, Tuesday. day, 29°; night, 19°; clear

30 July, wed

	732 mmHg		69%
	4.9 m/s

30 July, Wednesday. day, 29°; night, 19°; clear

31 July, thu

	732 mmHg		70%
	5.3 m/s

31 July, Thursday. day, 30°; night, 19°; clear

1 August, fri

	732 mmHg		71%
	5.5 m/s

1 August, Friday. day, 30°; night, 19°; clear

2 August, sat

	731 mmHg		73%
	5 m/s

2 August, Saturday. day, 29°; night, 19°; partly cloudy

3 August, sun

	731 mmHg		71%
	4.9 m/s

3 August, Sunday. day, 30°; night, 19°; partly cloudy

4 August, mon

	731 mmHg		73%
	5.3 m/s

4 August, Monday. day, 29°; night, 19°; rain

5 August, tue

	732 mmHg		75%
	4.9 m/s

5 August, Tuesday. day, 28°; night, 19°; rain

6 August, wed

	731 mmHg		76%
	5.3 m/s

6 August, Wednesday. day, 28°; night, 19°; rain

7 August, thu

	731 mmHg		76%
	5.2 m/s

7 August, Thursday. day, 29°; night, 19°; rain

8 August, fri

	731 mmHg		73%
	5 m/s

8 August, Friday. day, 29°; night, 20°; partly cloudy

9 August, sat

	731 mmHg		73%
	5.1 m/s

9 August, Saturday. day, 29°; night, 19°; clear

10 August, sun

	732 mmHg		73%
	4.8 m/s

10 August, Sunday. day, 28°; night, 19°; clear

11 August, mon

	732 mmHg		73%
	5 m/s

11 August, Monday. day, 28°; night, 18°; clear

12 August, tue

	731 mmHg		74%
	5.2 m/s

12 August, Tuesday. day, 28°; night, 19°; rain

13 August, wed

	732 mmHg		72%
	5.2 m/s

13 August, Wednesday. day, 28°; night, 18°; partly cloudy

14 August, thu

	732 mmHg		73%
	5.4 m/s

14 August, Thursday. day, 28°; night, 17°; clear

15 August, fri

	731 mmHg		74%
	5.5 m/s

15 August, Friday. day, 27°; night, 18°; rain

16 August, sat

	731 mmHg		75%
	5.6 m/s

16 August, Saturday. day, 28°; night, 18°; rain

17 August, sun

	732 mmHg		75%
	5 m/s

17 August, Sunday. day, 28°; night, 18°; clear

18 August, mon

	731 mmHg		75%
	5.7 m/s

18 August, Monday. day, 27°; night, 18°; partly cloudy

19 August, tue

	731 mmHg		75%
	5.7 m/s

19 August, Tuesday. day, 28°; night, 17°; partly cloudy

20 August, wed

	731 mmHg		75%
	5.9 m/s

20 August, Wednesday. day, 27°; night, 18°; rain

21 August, thu

	731 mmHg		74%
	5.5 m/s

21 August, Thursday. day, 28°; night, 18°; clear

22 August, fri

	732 mmHg		75%
	5.6 m/s

22 August, Friday. day, 29°; night, 19°; clear

23 August, sat

	731 mmHg		73%
	5.8 m/s

23 August, Saturday. day, 29°; night, 19°; clear

24 August, sun

	730 mmHg		72%
	5.8 m/s

24 August, Sunday. day, 29°; night, 20°; partly cloudy

25 August, mon

	731 mmHg		75%
	5.1 m/s

25 August, Monday. day, 28°; night, 19°; clear

26 August, tue

	731 mmHg		74%
	5.4 m/s

26 August, Tuesday. day, 28°; night, 19°; partly cloudy

27 August, wed

	731 mmHg		73%
	5.2 m/s

27 August, Wednesday. day, 28°; night, 19°; clear

28 August, thu

	730 mmHg		74%
	5.3 m/s

28 August, Thursday. day, 29°; night, 19°; rain

29 August, fri

	732 mmHg		72%
	5.5 m/s

29 August, Friday. day, 28°; night, 17°; clear

30 August, sat

	732 mmHg		70%
	5.3 m/s

30 August, Saturday. day, 28°; night, 17°; clear

31 August, sun

	732 mmHg		71%
	5.8 m/s

31 August, Sunday. day, 28°; night, 18°; clear

1 September, mon

	731 mmHg		72%
	5.6 m/s

1 September, Monday. day, 28°; night, 17°; clear

2 September, tue

	731 mmHg		71%
	6.1 m/s

2 September, Tuesday. day, 28°; night, 18°; rain

3 September, wed

	731 mmHg		70%
	6.1 m/s

3 September, Wednesday. day, 27°; night, 17°; clear

4 September, thu

	732 mmHg		69%
	5.6 m/s

4 September, Thursday. day, 28°; night, 17°; clear

5 September, fri

	732 mmHg		69%
	6.2 m/s

5 September, Friday. day, 28°; night, 17°; clear

6 September, sat

	731 mmHg		69%
	6.1 m/s

6 September, Saturday. day, 27°; night, 17°; clear

Average data for 10 years

Sioux City August

14

sunny days

9

days with precipitation

4

cloudy days

14 sunny days; 9 days with precipitation; 4 cloudy days;

73

%

air humidity

3.5

m/s

WindS

95

mm of precipitation

(12% of annual average)

air humidity 73%; 95 millimeters of precipitation (12% of annual average); Wind southerly 3.5 Meters per second

Weather graphs for August

TemperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

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S

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SE

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S

S

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S

SE

S

S

S

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S

S

S

S

S

S

SE

SE

S

S

S

SE

1

Average data for 10 years

2

3

4

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10

11

12

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14

15

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20

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31

Daytime temperature

Night-time temperature

Cities near you

Kansas City
Minnetonka
Omaha
Manhattan
Huron
New Ulm
Lincoln
Aberdeen
Eagan

Cities with similar weather in August

Ankara
Kishinev
Beltsi
Chicago
Tsandrypsh
Balkhash
Zagreb
Gyandja
Bergamo

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

In August, the weather in Sioux City is typically hot. Average daily high temperature in August is about 28 degrees above zero. On average, Sioux City has 14 sunny, 9 rainy, and 8 partly cloudy days in August. The rains are usually heavy.

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