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September weather forecast in Ontario

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

1 September, sun

	699 mmHg		25%
	5.4 m/s

1 September, Sunday. day, 30°; night, 23°; clear

2 September, mon

	700 mmHg		25%
	4.4 m/s

2 September, Monday. day, 27°; night, 21°; partly cloudy

3 September, tue

	699 mmHg		25%
	4.5 m/s

3 September, Tuesday. day, 29°; night, 22°; clear

4 September, wed

	699 mmHg		28%
	5.4 m/s

4 September, Wednesday. day, 26°; night, 20°; clear

5 September, thu

	700 mmHg		28%
	3.7 m/s

5 September, Thursday. day, 27°; night, 21°; clear

6 September, fri

	699 mmHg		25%
	4 m/s

6 September, Friday. day, 28°; night, 22°; clear

7 September, sat

	699 mmHg		31%
	4.3 m/s

7 September, Saturday. day, 28°; night, 22°; clear

8 September, sun

	699 mmHg		25%
	5.1 m/s

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

9 September, mon

	700 mmHg		25%
	4 m/s

9 September, Monday. day, 29°; night, 22°; clear

10 September, tue

	701 mmHg		23%
	4 m/s

10 September, Tuesday. day, 29°; night, 23°; clear

11 September, wed

	700 mmHg		23%
	3.5 m/s

11 September, Wednesday. day, 28°; night, 22°; clear

12 September, thu

	698 mmHg		25%
	4.3 m/s

12 September, Thursday. day, 29°; night, 22°; clear

13 September, fri

	698 mmHg		31%
	5.4 m/s

13 September, Friday. day, 26°; night, 21°; clear

14 September, sat

	699 mmHg		28%
	4.4 m/s

14 September, Saturday. day, 27°; night, 21°; partly cloudy

15 September, sun

	700 mmHg		31%
	3.7 m/s

15 September, Sunday. day, 27°; night, 21°; clear

16 September, mon

	699 mmHg		31%
	4.3 m/s

16 September, Monday. day, 26°; night, 20°; partly cloudy

17 September, tue

	699 mmHg		33%
	3.5 m/s

17 September, Tuesday. day, 26°; night, 20°; clear

18 September, wed

	699 mmHg		34%
	4.5 m/s

18 September, Wednesday. day, 26°; night, 20°; clear

19 September, thu

	699 mmHg		33%
	4.8 m/s

19 September, Thursday. day, 26°; night, 20°; clear

20 September, fri

	699 mmHg		34%
	4.5 m/s

20 September, Friday. day, 24°; night, 19°; clear

21 September, sat

	699 mmHg		37%
	4 m/s

21 September, Saturday. day, 23°; night, 19°; clear

22 September, sun

	700 mmHg		36%
	3.2 m/s

22 September, Sunday. day, 24°; night, 19°; partly cloudy

23 September, mon

	700 mmHg		34%
	4 m/s

23 September, Monday. day, 25°; night, 18°; clear

24 September, tue

	700 mmHg		31%
	4.8 m/s

24 September, Tuesday. day, 25°; night, 19°; partly cloudy

25 September, wed

	701 mmHg		33%
	4.8 m/s

25 September, Wednesday. day, 25°; night, 19°; clear

26 September, thu

	701 mmHg		34%
	4 m/s

26 September, Thursday. day, 25°; night, 20°; clear

27 September, fri

	700 mmHg		31%
	4 m/s

27 September, Friday. day, 26°; night, 21°; clear

28 September, sat

	699 mmHg		36%
	5.1 m/s

28 September, Saturday. day, 24°; night, 19°; clear

29 September, sun

	699 mmHg		33%
	4.6 m/s

29 September, Sunday. day, 24°; night, 18°; clear

30 September, mon

	701 mmHg		33%
	4.5 m/s

30 September, Monday. day, 24°; night, 17°; clear

1 October, tue

	700 mmHg		31%
	3.7 m/s

1 October, Tuesday. day, 23°; night, 17°; clear

2 October, wed

	698 mmHg		37%
	4.9 m/s

2 October, Wednesday. day, 21°; night, 15°; clear

3 October, thu

	699 mmHg		49%
	4.9 m/s

3 October, Thursday. day, 18°; night, 14°; clear

4 October, fri

	700 mmHg		43%
	3.7 m/s

4 October, Friday. day, 18°; night, 14°; clear

5 October, sat

	701 mmHg		40%
	3.7 m/s

5 October, Saturday. day, 20°; night, 15°; clear

Average data for 10 years

Ontario September

25

sunny days

0

days with precipitation

5

cloudy days

25 sunny days; 0 days with precipitation; 5 cloudy days;

30

%

air humidity

2.7

m/s

WindNW

8

mm of precipitation

(3% of annual average)

air humidity 30%; 8 millimeters of precipitation (3% of annual average); Wind north-westerly 2.7 Meters per second

Weather graphs for September

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

NW

NW

NW

NW

NW

NW

NW

NW

NW

N

NW

NW

NW

SE

NW

NW

W

NW

NW

NW

NW

NW

NW

NW

NW

N

NW

N

NW

W

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

Moscow
Boise
Mountain Home
Baker City
Moses Lake
Hermiston
Kennewick
Spokane
McCall

Cities with similar weather in September

Barcelona
Batumi
Heraklion
Seoul
Salou
Gudauta
Pisa
Hersonisos
Kos

The weather forecast for September 2024 is based on historical data from the past 10 years.

In September, the weather in Ontario is typically warm. Average daily high temperature in September is about 26 degrees above zero. On average, Ontario has 25 sunny and 5 partly cloudy days in September. September as well as May and June is considered the most comfortable time to visit Ontario.

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