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September weather forecast in Mackinaw 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

	745 mmHg		75%
	6.6 m/s		+19

31 August, Sunday. day, 21°; night, 17°; clear

1 September, mon

	746 mmHg		75%
	6.6 m/s		+19

1 September, Monday. day, 21°; night, 17°; clear

2 September, tue

	745 mmHg		77%
	7.2 m/s		+19

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

3 September, wed

	744 mmHg		78%
	7.3 m/s		+18

3 September, Wednesday. day, 21°; night, 17°; rain

4 September, thu

	745 mmHg		76%
	7.2 m/s		+18

4 September, Thursday. day, 20°; night, 16°; clear

5 September, fri

	746 mmHg		77%
	6.8 m/s		+18

5 September, Friday. day, 20°; night, 16°; clear

6 September, sat

	745 mmHg		77%
	6.9 m/s		+18

6 September, Saturday. day, 21°; night, 17°; clear

7 September, sun

	744 mmHg		78%
	7.4 m/s		+18

7 September, Sunday. day, 20°; night, 16°; rain

8 September, mon

	745 mmHg		76%
	7 m/s		+17

8 September, Monday. day, 19°; night, 15°; clear

9 September, tue

	746 mmHg		75%
	6.2 m/s		+18

9 September, Tuesday. day, 19°; night, 15°; clear

10 September, wed

	746 mmHg		77%
	6.8 m/s		+17

10 September, Wednesday. day, 19°; night, 15°; partly cloudy

11 September, thu

	745 mmHg		78%
	7.5 m/s		+18

11 September, Thursday. day, 19°; night, 15°; partly cloudy

12 September, fri

	745 mmHg		80%
	7.5 m/s		+17

12 September, Friday. day, 19°; night, 15°; rain

13 September, sat

	744 mmHg		79%
	7.2 m/s		+17

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

14 September, sun

	744 mmHg		77%
	7.5 m/s		+17

14 September, Sunday. day, 18°; night, 15°; partly cloudy

15 September, mon

	746 mmHg		76%
	6.7 m/s		+16

15 September, Monday. day, 18°; night, 14°; clear

16 September, tue

	746 mmHg		74%
	7.5 m/s		+16

16 September, Tuesday. day, 18°; night, 14°; clear

17 September, wed

	745 mmHg		76%
	6.8 m/s		+16

17 September, Wednesday. day, 19°; night, 15°; clear

18 September, thu

	746 mmHg		75%
	6.9 m/s		+16

18 September, Thursday. day, 18°; night, 14°; clear

19 September, fri

	744 mmHg		76%
	7.4 m/s		+16

19 September, Friday. day, 18°; night, 14°; partly cloudy

20 September, sat

	743 mmHg		80%
	7.5 m/s		+16

20 September, Saturday. day, 18°; night, 15°; rain

21 September, sun

	743 mmHg		78%
	7.9 m/s		+16

21 September, Sunday. day, 18°; night, 14°; rain

22 September, mon

	745 mmHg		77%
	8.1 m/s		+16

22 September, Monday. day, 16°; night, 13°; overcast

23 September, tue

	746 mmHg		77%
	7.1 m/s		+16

23 September, Tuesday. day, 16°; night, 12°; partly cloudy

24 September, wed

	745 mmHg		76%
	7.7 m/s		+15

24 September, Wednesday. day, 16°; night, 13°; overcast

25 September, thu

	744 mmHg		78%
	7.7 m/s		+16

25 September, Thursday. day, 16°; night, 13°; rain

26 September, fri

	743 mmHg		79%
	7.4 m/s		+16

26 September, Friday. day, 17°; night, 13°; rain

27 September, sat

	742 mmHg		80%
	7.7 m/s		+15

27 September, Saturday. day, 17°; night, 13°; rain

28 September, sun

	744 mmHg		77%
	7.2 m/s		+14

28 September, Sunday. day, 15°; night, 12°; partly cloudy

29 September, mon

	745 mmHg		77%
	7.1 m/s		+14

29 September, Monday. day, 15°; night, 12°; rain

30 September, tue

	745 mmHg		75%
	7.7 m/s		+14

30 September, Tuesday. day, 15°; night, 12°; rain

1 October, wed

	745 mmHg		75%
	7.9 m/s		+13

1 October, Wednesday. day, 15°; night, 12°; clear

2 October, thu

	745 mmHg		76%
	7.7 m/s		+14

2 October, Thursday. day, 15°; night, 11°; clear

3 October, fri

	745 mmHg		76%
	8.3 m/s		+13

3 October, Friday. day, 14°; night, 11°; rain

4 October, sat

	745 mmHg		77%
	7.5 m/s		+14

4 October, Saturday. day, 15°; night, 11°; rain

Average data for 10 years

Mackinaw City September

11

sunny days

11

days with precipitation

6

cloudy days

11 sunny days; 11 days with precipitation; 6 cloudy days;

77

%

air humidity

5

m/s

WindS

98

mm of precipitation

(10% of annual average)

+17

°C

Water temperature

air humidity 77%; 98 millimeters of precipitation (10% of annual average); Wind southerly 5 Meters per second; Water temperature +17°

Weather graphs for September

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

S

SW

SW

SW

SW

SW

SW

S

S

S

SW

S

S

SW

SW

S

SW

S

S

SW

SW

SW

S

S

S

S

S

S

SW

S

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

Detroit
Sheboygan
Appleton
Livonia
Ann Arbor
Sault Ste. Marie
Traverse City
Sarnia
Chelsea

Cities with similar weather in September

Copenhagen
Vancouver
Gdansk
Looe
Montreal
Bruges
Liverpool
Brighton
Rostock

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

In September, the weather in Mackinaw City is typically warm. Average daily high temperature in September is about 18 degrees above zero. On average, Mackinaw City has 11 rainy, 11 sunny, 6 partly cloudy, and 2 cloudy days in September. The rains are usually heavy.

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