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September weather forecast in Niagara Falls

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

	754 mmHg		73%
	4.9 m/s		+22

31 August, Sunday. day, 24°; night, 19°; clear

1 September, mon

	755 mmHg		73%
	4.69 m/s		+22

1 September, Monday. day, 23°; night, 18°; clear

2 September, tue

	754 mmHg		74%
	5 m/s		+22

2 September, Tuesday. day, 23°; night, 19°; clear

3 September, wed

	753 mmHg		76%
	4.9 m/s		+22

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

4 September, thu

	754 mmHg		75%
	5.3 m/s		+22

4 September, Thursday. day, 24°; night, 19°; clear

5 September, fri

	755 mmHg		74%
	5.5 m/s		+21

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

6 September, sat

	755 mmHg		74%
	4.9 m/s		+21

6 September, Saturday. day, 23°; night, 18°; clear

7 September, sun

	753 mmHg		77%
	6.1 m/s		+20

7 September, Sunday. day, 23°; night, 19°; rain

8 September, mon

	753 mmHg		76%
	6.3 m/s		+21

8 September, Monday. day, 22°; night, 18°; rain

9 September, tue

	754 mmHg		76%
	5.2 m/s		+20

9 September, Tuesday. day, 21°; night, 17°; rain

10 September, wed

	755 mmHg		74%
	5.4 m/s		+20

10 September, Wednesday. day, 22°; night, 17°; partly cloudy

11 September, thu

	755 mmHg		73%
	5.3 m/s		+20

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

12 September, fri

	754 mmHg		77%
	5.5 m/s		+20

12 September, Friday. day, 22°; night, 17°; rain

13 September, sat

	753 mmHg		77%
	5.4 m/s		+20

13 September, Saturday. day, 21°; night, 17°; rain

14 September, sun

	754 mmHg		76%
	5.7 m/s		+20

14 September, Sunday. day, 21°; night, 17°; partly cloudy

15 September, mon

	755 mmHg		75%
	5.6 m/s		+19

15 September, Monday. day, 20°; night, 16°; rain

16 September, tue

	756 mmHg		75%
	4.9 m/s		+19

16 September, Tuesday. day, 20°; night, 15°; partly cloudy

17 September, wed

	755 mmHg		75%
	5.1 m/s		+19

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

18 September, thu

	755 mmHg		74%
	5 m/s		+19

18 September, Thursday. day, 21°; night, 16°; clear

19 September, fri

	755 mmHg		73%
	5.4 m/s		+19

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

20 September, sat

	754 mmHg		74%
	5.5 m/s		+19

20 September, Saturday. day, 21°; night, 16°; clear

21 September, sun

	754 mmHg		75%
	5.6 m/s		+19

21 September, Sunday. day, 21°; night, 16°; partly cloudy

22 September, mon

	754 mmHg		75%
	6.2 m/s		+19

22 September, Monday. day, 20°; night, 16°; rain

23 September, tue

	754 mmHg		74%
	6.1 m/s		+19

23 September, Tuesday. day, 19°; night, 15°; rain

24 September, wed

	755 mmHg		73%
	5.7 m/s		+18

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

25 September, thu

	754 mmHg		76%
	6 m/s		+19

25 September, Thursday. day, 19°; night, 15°; overcast

26 September, fri

	753 mmHg		76%
	5.9 m/s		+18

26 September, Friday. day, 19°; night, 15°; overcast

27 September, sat

	753 mmHg		76%
	6.3 m/s		+18

27 September, Saturday. day, 20°; night, 15°; overcast

28 September, sun

	752 mmHg		76%
	6.1 m/s		+18

28 September, Sunday. day, 19°; night, 15°; rain

29 September, mon

	753 mmHg		75%
	6.2 m/s		+17

29 September, Monday. day, 18°; night, 14°; partly cloudy

30 September, tue

	754 mmHg		75%
	6.1 m/s		+17

30 September, Tuesday. day, 17°; night, 13°; rain

1 October, wed

	754 mmHg		74%
	5.9 m/s		+17

1 October, Wednesday. day, 18°; night, 13°; clear

2 October, thu

	754 mmHg		77%
	6.2 m/s		+16

2 October, Thursday. day, 18°; night, 13°; rain

3 October, fri

	755 mmHg		76%
	6.3 m/s		+16

3 October, Friday. day, 17°; night, 13°; rain

4 October, sat

	755 mmHg		77%
	6.3 m/s		+16

4 October, Saturday. day, 17°; night, 14°; rain

Average data for 10 years

Niagara Falls September

11

sunny days

10

days with precipitation

6

cloudy days

11 sunny days; 10 days with precipitation; 6 cloudy days;

75

%

air humidity

3.8

m/s

WindS

85

mm of precipitation

(9% of annual average)

+20

°C

Water temperature

air humidity 75%; 85 millimeters of precipitation (9% of annual average); Wind southerly 3.8 Meters per second; Water temperature +20°

Weather graphs for September

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

S

S

S

S

S

S

S

S

S

S

S

S

SW

SW

SW

S

S

S

S

S

S

SW

S

S

S

S

S

S

S

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

Toronto
Pittsburgh
Cleveland
Brooklyn
Macedonia
Burlington
Buffalo
Milan
London

Cities with similar weather in September

Burgas
Varna
Podgorica
The Golden Sands
Chicago
Genoa
Boston
Seattle
Dubrovnik

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

In September, the weather in Niagara Falls is typically warm. Average daily high temperature in September is about 21 degrees above zero. On average, Niagara Falls has 11 sunny, 10 rainy, 6 partly cloudy, and 3 cloudy days in September. The rains are usually heavy.

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