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September weather forecast in South Milwaukee

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

31 August, sun

	745 mmHg		67%
	5.1 m/s		+20

31 August, Sunday. day, 25°; night, 22°; clear

1 September, mon

	745 mmHg		63%
	5.1 m/s		+20

1 September, Monday. day, 24°; night, 21°; clear

2 September, tue

	745 mmHg		66%
	5.1 m/s		+20

2 September, Tuesday. day, 24°; night, 20°; clear

3 September, wed

	745 mmHg		68%
	5.8 m/s		+20

3 September, Wednesday. day, 22°; night, 20°; partly cloudy

4 September, thu

	746 mmHg		70%
	5.6 m/s		+20

4 September, Thursday. day, 21°; night, 18°; clear

5 September, fri

	746 mmHg		62%
	5.6 m/s		+20

5 September, Friday. day, 23°; night, 18°; clear

6 September, sat

	745 mmHg		62%
	5.6 m/s		+20

6 September, Saturday. day, 23°; night, 20°; clear

7 September, sun

	746 mmHg		72%
	5.8 m/s		+19

7 September, Sunday. day, 21°; night, 19°; clear

8 September, mon

	746 mmHg		69%
	5.1 m/s		+19

8 September, Monday. day, 21°; night, 18°; clear

9 September, tue

	746 mmHg		68%
	5.8 m/s		+19

9 September, Tuesday. day, 22°; night, 18°; clear

10 September, wed

	747 mmHg		68%
	5.5 m/s		+19

10 September, Wednesday. day, 20°; night, 18°; clear

11 September, thu

	746 mmHg		61%
	5.4 m/s		+19

11 September, Thursday. day, 22°; night, 17°; clear

12 September, fri

	746 mmHg		62%
	5.5 m/s		+19

12 September, Friday. day, 20°; night, 17°; clear

13 September, sat

	746 mmHg		63%
	5.5 m/s		+19

13 September, Saturday. day, 21°; night, 17°; partly cloudy

14 September, sun

	747 mmHg		67%
	5.5 m/s		+19

14 September, Sunday. day, 19°; night, 17°; partly cloudy

15 September, mon

	749 mmHg		66%
	6.6 m/s		+18

15 September, Monday. day, 19°; night, 17°; partly cloudy

16 September, tue

	747 mmHg		66%
	5.1 m/s		+18

16 September, Tuesday. day, 21°; night, 17°; clear

17 September, wed

	746 mmHg		76%
	6 m/s		+18

17 September, Wednesday. day, 20°; night, 18°; rain

18 September, thu

	746 mmHg		70%
	5.3 m/s		+18

18 September, Thursday. day, 19°; night, 17°; partly cloudy

19 September, fri

	744 mmHg		63%
	6.3 m/s		+18

19 September, Friday. day, 22°; night, 17°; partly cloudy

20 September, sat

	744 mmHg		62%
	5.8 m/s		+18

20 September, Saturday. day, 21°; night, 19°; clear

21 September, sun

	747 mmHg		72%
	5 m/s		+18

21 September, Sunday. day, 20°; night, 17°; clear

22 September, mon

	748 mmHg		68%
	5.3 m/s		+18

22 September, Monday. day, 21°; night, 17°; rain

23 September, tue

	748 mmHg		70%
	5.8 m/s		+17

23 September, Tuesday. day, 20°; night, 18°; partly cloudy

24 September, wed

	748 mmHg		68%
	5.9 m/s		+17

24 September, Wednesday. day, 19°; night, 17°; clear

25 September, thu

	745 mmHg		70%
	5.9 m/s		+17

25 September, Thursday. day, 20°; night, 17°; rain

26 September, fri

	745 mmHg		68%
	5.8 m/s		+17

26 September, Friday. day, 19°; night, 16°; clear

27 September, sat

	743 mmHg		68%
	5.5 m/s		+17

27 September, Saturday. day, 19°; night, 15°; rain

28 September, sun

	745 mmHg		69%
	8.3 m/s		+17

28 September, Sunday. day, 17°; night, 15°; clear

29 September, mon

	747 mmHg		67%
	6.5 m/s		+16

29 September, Monday. day, 16°; night, 13°; partly cloudy

30 September, tue

	747 mmHg		68%
	6 m/s		+16

30 September, Tuesday. day, 16°; night, 13°; clear

1 October, wed

	745 mmHg		68%
	6 m/s		+15

1 October, Wednesday. day, 16°; night, 14°; overcast

2 October, thu

	745 mmHg		74%
	6 m/s		+15

2 October, Thursday. day, 16°; night, 14°; partly cloudy

3 October, fri

	747 mmHg		75%
	5.5 m/s		+15

3 October, Friday. day, 15°; night, 13°; partly cloudy

4 October, sat

	747 mmHg		67%
	4.6 m/s		+15

4 October, Saturday. day, 17°; night, 13°; partly cloudy

Average data for 10 years

South Milwaukee September

18

sunny days

4

days with precipitation

8

cloudy days

18 sunny days; 4 days with precipitation; 8 cloudy days;

68

%

air humidity

4.1

m/s

WindNW

56

mm of precipitation

(8% of annual average)

+18

°C

Water temperature

air humidity 68%; 56 millimeters of precipitation (8% of annual average); Wind north-westerly 4.1 Meters per second; Water temperature +18°

Weather graphs for September

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

NE

W

W

NE

SE

W

NE

N

SE

SW

W

W

SW

NW

E

S

SW

E

S

SW

SE

S

SE

SE

E

SE

W

N

N

NE

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

Daytime temperature

Night-time temperature

Cities near you

Chicago
Wisconsin Dells
Indianapolis
Michigan City
Iowa City
Ottawa
Appleton
Dixon
Gurnee

Cities with similar weather in September

Varna
Podgorica
Toronto
The Golden Sands
Genoa
Boston
Seattle
Tsandrypsh
Kotor

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

In September, the weather in South Milwaukee is typically warm. Average daily high temperature in September is about 20 degrees above zero. On average, South Milwaukee has 18 sunny, 8 partly cloudy, and 4 rainy days in September. The rains are usually light. September as well as July and August is considered the most comfortable time to visit South Milwaukee.

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