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September weather forecast in St Petersburg

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

	760 mmHg		80%
	5.8 m/s		+30

31 August, Sunday. day, 29°; night, 26°; rain

1 September, mon

	761 mmHg		81%
	6.2 m/s		+30

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

2 September, tue

	761 mmHg		80%
	6.2 m/s		+30

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

3 September, wed

	760 mmHg		78%
	5.9 m/s		+30

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

4 September, thu

	760 mmHg		78%
	5.7 m/s		+31

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

5 September, fri

	760 mmHg		80%
	6.6 m/s		+30

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

6 September, sat

	760 mmHg		80%
	6.4 m/s		+30

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

7 September, sun

	760 mmHg		80%
	5.9 m/s		+30

7 September, Sunday. day, 28°; night, 26°; rain

8 September, mon

	760 mmHg		80%
	5.8 m/s		+30

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

9 September, tue

	760 mmHg		79%
	5.9 m/s		+30

9 September, Tuesday. day, 28°; night, 26°; rain

10 September, wed

	760 mmHg		80%
	6.1 m/s		+30

10 September, Wednesday. day, 28°; night, 26°; rain

11 September, thu

	760 mmHg		79%
	6.6 m/s		+30

11 September, Thursday. day, 28°; night, 25°; clear

12 September, fri

	761 mmHg		78%
	6.5 m/s		+30

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

13 September, sat

	760 mmHg		78%
	6.2 m/s		+30

13 September, Saturday. day, 28°; night, 26°; partly cloudy

14 September, sun

	760 mmHg		78%
	6 m/s		+30

14 September, Sunday. day, 28°; night, 26°; partly cloudy

15 September, mon

	760 mmHg		78%
	6.5 m/s		+30

15 September, Monday. day, 28°; night, 26°; overcast

16 September, tue

	761 mmHg		78%
	6 m/s		+30

16 September, Tuesday. day, 28°; night, 26°; rain

17 September, wed

	760 mmHg		79%
	6.1 m/s		+30

17 September, Wednesday. day, 28°; night, 26°; rain

18 September, thu

	760 mmHg		78%
	6.2 m/s		+30

18 September, Thursday. day, 28°; night, 25°; rain

19 September, fri

	760 mmHg		77%
	6.2 m/s		+30

19 September, Friday. day, 28°; night, 25°; clear

20 September, sat

	760 mmHg		78%
	6.5 m/s		+30

20 September, Saturday. day, 28°; night, 25°; rain

21 September, sun

	760 mmHg		77%
	6.5 m/s		+30

21 September, Sunday. day, 28°; night, 25°; partly cloudy

22 September, mon

	760 mmHg		78%
	6.6 m/s		+30

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

23 September, tue

	760 mmHg		77%
	6.2 m/s		+30

23 September, Tuesday. day, 28°; night, 25°; clear

24 September, wed

	760 mmHg		77%
	6.2 m/s		+30

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

25 September, thu

	760 mmHg		79%
	6.5 m/s		+30

25 September, Thursday. day, 28°; night, 25°; clear

26 September, fri

	759 mmHg		81%
	7.2 m/s		+29

26 September, Friday. day, 27°; night, 25°; rain

27 September, sat

	759 mmHg		80%
	7 m/s		+30

27 September, Saturday. day, 28°; night, 25°; rain

28 September, sun

	760 mmHg		79%
	6.4 m/s		+29

28 September, Sunday. day, 27°; night, 25°; clear

29 September, mon

	759 mmHg		79%
	6.8 m/s		+29

29 September, Monday. day, 28°; night, 25°; partly cloudy

30 September, tue

	760 mmHg		77%
	6.7 m/s		+29

30 September, Tuesday. day, 27°; night, 25°; clear

1 October, wed

	760 mmHg		75%
	6.7 m/s		+29

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

2 October, thu

	760 mmHg		75%
	6.8 m/s		+29

2 October, Thursday. day, 27°; night, 24°; rain

3 October, fri

	761 mmHg		76%
	6.9 m/s		+29

3 October, Friday. day, 27°; night, 24°; partly cloudy

4 October, sat

	761 mmHg		77%
	7.3 m/s		+28

4 October, Saturday. day, 27°; night, 24°; rain

Average data for 10 years

St Petersburg September

8

sunny days

17

days with precipitation

8

cloudy days

8 sunny days; 17 days with precipitation; 8 cloudy days;

79

%

air humidity

4.3

m/s

WindSE

150

mm of precipitation

(15% of annual average)

+30

°C

Water temperature

air humidity 79%; 150 millimeters of precipitation (15% of annual average); Wind south-easterly 4.3 Meters per second; Water temperature +30°

Weather graphs for September

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

S

SE

S

S

S

S

S

SE

SE

SE

SE

SE

SE

SE

S

S

S

S

SE

SE

SE

SE

SE

SE

SE

S

S

S

SE

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

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27

28

29

30

Daytime temperature

Night-time temperature

Cities near you

Miami
Orlando
Tampa
Miami Beach
Madeira Beach
Sarasota
Boca Raton
Palm Coast
Sunrise

Cities with similar weather in September

Nha Trang
Ayia Napa
Sanya
Hurgada
Santo Domingo
Protaras
Varadero
Havana
Ko Chang

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

In September, the weather in St Petersburg is typically hot. Average daily high temperature in September is about 28 degrees above zero. On average, St Petersburg has 17 rainy, 8 sunny, 4 partly cloudy, and 1 cloudy day in September. The rains are usually heavy. September as well as June, July, and August is considered the most uncomfortable time to visit St Petersburg.

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