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September weather forecast in Bay 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

31 August, sun

	759 mmHg		68%
	4.1 m/s		+31

31 August, Sunday. day, 31°; night, 28°; rain

1 September, mon

	759 mmHg		69%
	4.8 m/s		+31

1 September, Monday. day, 31°; night, 27°; clear

2 September, tue

	758 mmHg		67%
	4.9 m/s		+31

2 September, Tuesday. day, 31°; night, 28°; partly cloudy

3 September, wed

	758 mmHg		68%
	4.1 m/s		+31

3 September, Wednesday. day, 31°; night, 27°; clear

4 September, thu

	759 mmHg		67%
	4.6 m/s		+31

4 September, Thursday. day, 31°; night, 27°; rain

5 September, fri

	760 mmHg		69%
	4.5 m/s		+30

5 September, Friday. day, 30°; night, 27°; clear

6 September, sat

	760 mmHg		68%
	4.4 m/s		+30

6 September, Saturday. day, 29°; night, 26°; rain

7 September, sun

	760 mmHg		70%
	4.6 m/s		+30

7 September, Sunday. day, 30°; night, 26°; rain

8 September, mon

	759 mmHg		72%
	4.9 m/s		+30

8 September, Monday. day, 30°; night, 26°; clear

9 September, tue

	759 mmHg		69%
	4.5 m/s		+30

9 September, Tuesday. day, 29°; night, 26°; rain

10 September, wed

	760 mmHg		69%
	4.5 m/s		+30

10 September, Wednesday. day, 29°; night, 26°; rain

11 September, thu

	759 mmHg		68%
	4 m/s		+30

11 September, Thursday. day, 30°; night, 25°; rain

12 September, fri

	758 mmHg		70%
	6 m/s		+30

12 September, Friday. day, 29°; night, 26°; rain

13 September, sat

	758 mmHg		73%
	5.3 m/s		+30

13 September, Saturday. day, 29°; night, 26°; clear

14 September, sun

	760 mmHg		75%
	4.8 m/s		+30

14 September, Sunday. day, 30°; night, 26°; clear

15 September, mon

	760 mmHg		74%
	4.9 m/s		+29

15 September, Monday. day, 29°; night, 26°; rain

16 September, tue

	760 mmHg		75%
	4.5 m/s		+30

16 September, Tuesday. day, 29°; night, 25°; clear

17 September, wed

	759 mmHg		76%
	4.1 m/s		+29

17 September, Wednesday. day, 28°; night, 25°; clear

18 September, thu

	759 mmHg		74%
	4 m/s		+30

18 September, Thursday. day, 29°; night, 26°; clear

19 September, fri

	759 mmHg		75%
	4.9 m/s		+30

19 September, Friday. day, 29°; night, 26°; rain

20 September, sat

	759 mmHg		70%
	4.4 m/s		+29

20 September, Saturday. day, 29°; night, 26°; clear

21 September, sun

	760 mmHg		68%
	4.6 m/s		+29

21 September, Sunday. day, 29°; night, 26°; clear

22 September, mon

	760 mmHg		72%
	4.8 m/s		+29

22 September, Monday. day, 28°; night, 25°; rain

23 September, tue

	760 mmHg		70%
	4.5 m/s		+29

23 September, Tuesday. day, 29°; night, 25°; rain

24 September, wed

	760 mmHg		70%
	4.9 m/s		+29

24 September, Wednesday. day, 29°; night, 25°; clear

25 September, thu

	759 mmHg		69%
	4.5 m/s		+30

25 September, Thursday. day, 29°; night, 26°; rain

26 September, fri

	759 mmHg		70%
	4.9 m/s		+29

26 September, Friday. day, 28°; night, 25°; rain

27 September, sat

	759 mmHg		74%
	4.1 m/s		+29

27 September, Saturday. day, 28°; night, 24°; clear

28 September, sun

	759 mmHg		73%
	3.5 m/s		+29

28 September, Sunday. day, 28°; night, 24°; rain

29 September, mon

	759 mmHg		67%
	3.9 m/s		+29

29 September, Monday. day, 29°; night, 24°; clear

30 September, tue

	759 mmHg		63%
	4 m/s		+29

30 September, Tuesday. day, 28°; night, 24°; clear

1 October, wed

	759 mmHg		61%
	4.4 m/s		+28

1 October, Wednesday. day, 27°; night, 24°; rain

2 October, thu

	760 mmHg		62%
	4.3 m/s		+28

2 October, Thursday. day, 27°; night, 23°; clear

3 October, fri

	761 mmHg		63%
	4.5 m/s		+28

3 October, Friday. day, 27°; night, 23°; clear

4 October, sat

	760 mmHg		66%
	4.5 m/s		+28

4 October, Saturday. day, 28°; night, 23°; rain

Average data for 10 years

Bay City September

15

sunny days

14

days with precipitation

1

cloudy day

15 sunny days; 14 days with precipitation; 1 cloudy day;

70

%

air humidity

3.4

m/s

WindE

166

mm of precipitation

(14% of annual average)

+30

°C

Water temperature

air humidity 70%; 166 millimeters of precipitation (14% of annual average); Wind easterly 3.4 Meters per second; Water temperature +30°

Weather graphs for September

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

E

SE

SE

E

E

SE

SE

SE

SE

E

NE

NE

SE

E

NE

NE

E

E

SE

E

E

NE

E

E

E

E

NE

NE

NE

E

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

Austin
Dallas
Houston
Texas City
San Antonio
College Station
Brownsville
South Padre Island
Tyler

Cities with similar weather in September

Nha Trang
Ayia Napa
Sanya
Hurgada
Protaras
Varadero
Samui
Havana
Hong Kong

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

In September, the weather in Bay City is typically hot. Average daily high temperature in September is about 29 degrees above zero. On average, Bay City has 15 sunny, 14 rainy, and 1 partly cloudy day in September. The rains are usually heavy. September as well as June, July, August, and December is considered the most uncomfortable time to visit Bay City.

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