10 day forecast Monthly forecast Weather map

City or area

Go to comparison

September weather forecast in Saint John's

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

	753 mmHg		84%
	8.2 m/s		+17

31 August, Sunday. day, 17°; night, 13°; rain

1 September, mon

	753 mmHg		84%
	7.6 m/s		+16

1 September, Monday. day, 16°; night, 13°; rain

2 September, tue

	755 mmHg		81%
	6.9 m/s		+16

2 September, Tuesday. day, 16°; night, 12°; clear

3 September, wed

	756 mmHg		81%
	7 m/s		+16

3 September, Wednesday. day, 17°; night, 12°; clear

4 September, thu

	756 mmHg		82%
	7.2 m/s		+17

4 September, Thursday. day, 17°; night, 13°; partly cloudy

5 September, fri

	754 mmHg		84%
	8 m/s		+17

5 September, Friday. day, 17°; night, 13°; clear

6 September, sat

	755 mmHg		81%
	7.4 m/s		+17

6 September, Saturday. day, 17°; night, 13°; clear

7 September, sun

	755 mmHg		81%
	8 m/s		+16

7 September, Sunday. day, 16°; night, 12°; partly cloudy

8 September, mon

	754 mmHg		83%
	7.8 m/s		+15

8 September, Monday. day, 17°; night, 12°; rain

9 September, tue

	756 mmHg		83%
	6.9 m/s		+15

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

10 September, wed

	756 mmHg		85%
	8 m/s		+15

10 September, Wednesday. day, 16°; night, 12°; rain

11 September, thu

	754 mmHg		84%
	8.89 m/s		+16

11 September, Thursday. day, 15°; night, 12°; rain

12 September, fri

	754 mmHg		83%
	8.39 m/s		+16

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

13 September, sat

	755 mmHg		80%
	7.9 m/s		+16

13 September, Saturday. day, 16°; night, 11°; clear

14 September, sun

	756 mmHg		83%
	7.9 m/s		+16

14 September, Sunday. day, 16°; night, 11°; clear

15 September, mon

	756 mmHg		84%
	7.5 m/s		+15

15 September, Monday. day, 16°; night, 11°; partly cloudy

16 September, tue

	755 mmHg		84%
	8.2 m/s		+14

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

17 September, wed

	755 mmHg		80%
	8 m/s		+14

17 September, Wednesday. day, 15°; night, 11°; clear

18 September, thu

	755 mmHg		83%
	7.8 m/s		+15

18 September, Thursday. day, 15°; night, 11°; rain

19 September, fri

	756 mmHg		81%
	7.8 m/s		+14

19 September, Friday. day, 14°; night, 10°; partly cloudy

20 September, sat

	756 mmHg		80%
	8.1 m/s		+14

20 September, Saturday. day, 14°; night, 10°; rain

21 September, sun

	755 mmHg		81%
	8.3 m/s		+15

21 September, Sunday. day, 14°; night, 11°; overcast

22 September, mon

	756 mmHg		80%
	8.1 m/s		+15

22 September, Monday. day, 14°; night, 10°; clear

23 September, tue

	755 mmHg		81%
	8.3 m/s		+14

23 September, Tuesday. day, 15°; night, 11°; partly cloudy

24 September, wed

	753 mmHg		81%
	8.6 m/s		+13

24 September, Wednesday. day, 14°; night, 11°; rain

25 September, thu

	755 mmHg		78%
	7.7 m/s		+12

25 September, Thursday. day, 13°; night, 9°; rain

26 September, fri

	756 mmHg		79%
	7.4 m/s		+12

26 September, Friday. day, 12°; night, 9°; partly cloudy

27 September, sat

	756 mmHg		82%
	7.7 m/s		+13

27 September, Saturday. day, 13°; night, 9°; rain

28 September, sun

	756 mmHg		82%
	8.2 m/s		+13

28 September, Sunday. day, 13°; night, 9°; overcast

29 September, mon

	756 mmHg		84%
	8 m/s		+14

29 September, Monday. day, 14°; night, 10°; rain

30 September, tue

	757 mmHg		82%
	7.7 m/s		+14

30 September, Tuesday. day, 14°; night, 10°; partly cloudy

1 October, wed

	757 mmHg		84%
	7.6 m/s		+13

1 October, Wednesday. day, 14°; night, 10°; partly cloudy

2 October, thu

	755 mmHg		84%
	7.9 m/s		+12

2 October, Thursday. day, 14°; night, 10°; rain

3 October, fri

	754 mmHg		82%
	8.2 m/s		+12

3 October, Friday. day, 12°; night, 10°; overcast

4 October, sat

	756 mmHg		79%
	7.8 m/s		+12

4 October, Saturday. day, 11°; night, 8°; clear

Average data for 10 years

Saint John's September

8

sunny days

12

days with precipitation

12

cloudy days

8 sunny days; 12 days with precipitation; 12 cloudy days;

82

%

air humidity

5.6

m/s

WindSW

104

mm of precipitation

(9% of annual average)

+15

°C

Water temperature

air humidity 82%; 104 millimeters of precipitation (9% of annual average); Wind south-westerly 5.6 Meters per second; Water temperature +15°

Weather graphs for September

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

SW

SW

S

S

S

SW

SW

SW

S

S

SW

SW

S

S

SW

SW

SW

SW

SW

S

SW

SW

SW

SW

SW

S

SW

SW

SW

SW

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

Sydney
Halifax
Deer Lake
Enfield
Blanc-Sablon
Charlottetown
Gander
St. Anthony
Corner Brook

Cities with similar weather in September

Helsinki
Riga
Tallinn
Stockholm
Cholpon-Ata
Oslo
Yurmala
Palanga
Dublin

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

September in Saint John's is the sunniest month of the year. In September, the weather in Saint John's is typically warm. Average daily high temperature in September is about 15 degrees above zero. On average, Saint John's has 12 rainy, 8 sunny, 8 partly cloudy, and 2 cloudy days in September. The rains are usually heavy.

Links

Help Terms of use Contact us

For partners

Advertisement Yandex.Weather API

Weather forecasts

Hourly forecast Detailed 10 day forecast Monthly forecast Weather map Magnetic storms

Download app

English

English
Русский

Source data: Yandex.Traffic, Roshydromet FSBI "CAO", NOAA, © OpenStreetMap

© 2017–2025 YANDEX LLC