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September weather forecast in Banja Luka

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

	728 mmHg		73%
	2.7 m/s

31 August, Sunday. day, 25°; night, 14°; partly cloudy

1 September, mon

	728 mmHg		74%
	2.8 m/s

1 September, Monday. day, 24°; night, 14°; clear

2 September, tue

	729 mmHg		76%
	2.5 m/s

2 September, Tuesday. day, 24°; night, 14°; clear

3 September, wed

	729 mmHg		75%
	2.4 m/s

3 September, Wednesday. day, 25°; night, 13°; partly cloudy

4 September, thu

	729 mmHg		75%
	2.7 m/s

4 September, Thursday. day, 24°; night, 14°; clear

5 September, fri

	729 mmHg		76%
	3.1 m/s

5 September, Friday. day, 23°; night, 13°; partly cloudy

6 September, sat

	729 mmHg		75%
	2.9 m/s

6 September, Saturday. day, 23°; night, 13°; clear

7 September, sun

	729 mmHg		74%
	2.7 m/s

7 September, Sunday. day, 24°; night, 13°; partly cloudy

8 September, mon

	729 mmHg		74%
	3 m/s

8 September, Monday. day, 24°; night, 13°; overcast

9 September, tue

	729 mmHg		74%
	2.9 m/s

9 September, Tuesday. day, 24°; night, 13°; clear

10 September, wed

	729 mmHg		75%
	2.6 m/s

10 September, Wednesday. day, 23°; night, 13°; rain

11 September, thu

	729 mmHg		75%
	2.6 m/s

11 September, Thursday. day, 24°; night, 13°; clear

12 September, fri

	728 mmHg		74%
	2.5 m/s

12 September, Friday. day, 24°; night, 13°; rain

13 September, sat

	728 mmHg		77%
	2.6 m/s

13 September, Saturday. day, 23°; night, 12°; rain

14 September, sun

	728 mmHg		77%
	3 m/s

14 September, Sunday. day, 23°; night, 12°; rain

15 September, mon

	729 mmHg		77%
	2.7 m/s

15 September, Monday. day, 23°; night, 12°; partly cloudy

16 September, tue

	728 mmHg		75%
	2.7 m/s

16 September, Tuesday. day, 23°; night, 12°; overcast

17 September, wed

	727 mmHg		78%
	3.1 m/s

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

18 September, thu

	729 mmHg		78%
	2.6 m/s

18 September, Thursday. day, 22°; night, 11°; overcast

19 September, fri

	729 mmHg		80%
	2.9 m/s

19 September, Friday. day, 21°; night, 11°; rain

20 September, sat

	730 mmHg		78%
	2.8 m/s

20 September, Saturday. day, 20°; night, 11°; rain

21 September, sun

	730 mmHg		77%
	2.7 m/s

21 September, Sunday. day, 21°; night, 11°; clear

22 September, mon

	730 mmHg		78%
	2.6 m/s

22 September, Monday. day, 20°; night, 10°; partly cloudy

23 September, tue

	729 mmHg		77%
	2.4 m/s

23 September, Tuesday. day, 21°; night, 10°; clear

24 September, wed

	729 mmHg		79%
	2.6 m/s

24 September, Wednesday. day, 21°; night, 10°; rain

25 September, thu

	729 mmHg		81%
	2.5 m/s

25 September, Thursday. day, 20°; night, 10°; rain

26 September, fri

	729 mmHg		79%
	3 m/s

26 September, Friday. day, 20°; night, 11°; rain

27 September, sat

	730 mmHg		78%
	2.9 m/s

27 September, Saturday. day, 20°; night, 11°; rain

28 September, sun

	730 mmHg		78%
	2.8 m/s

28 September, Sunday. day, 20°; night, 10°; partly cloudy

29 September, mon

	730 mmHg		79%
	2.5 m/s

29 September, Monday. day, 20°; night, 10°; clear

30 September, tue

	730 mmHg		77%
	2.6 m/s

30 September, Tuesday. day, 20°; night, 9°; clear

1 October, wed

	729 mmHg		77%
	2.7 m/s

1 October, Wednesday. day, 21°; night, 10°; clear

2 October, thu

	729 mmHg		80%
	2.5 m/s

2 October, Thursday. day, 21°; night, 10°; rain

3 October, fri

	730 mmHg		79%
	2.7 m/s

3 October, Friday. day, 20°; night, 10°; rain

4 October, sat

	730 mmHg		78%
	2.8 m/s

4 October, Saturday. day, 20°; night, 10°; rain

Average data for 10 years

Banja Luka September

10

sunny days

11

days with precipitation

7

cloudy days

10 sunny days; 11 days with precipitation; 7 cloudy days;

77

%

air humidity

1.6

m/s

WindS

101

mm of precipitation

(11% of annual average)

air humidity 77%; 101 millimeters of precipitation (11% of annual average); Wind southerly 1.6 Meters per second

Weather graphs for September

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

SW

S

S

S

S

S

S

S

S

S

S

S

SW

S

S

S

S

S

S

SW

S

S

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

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27

28

29

30

Daytime temperature

Night-time temperature

Cities near you

Belgrade
Budapest
Vienna
Budva
Podgorica
Tivat
Novi Sad
Sarajevo
Herceg Novi

Cities with similar weather in September

Yerevan
Ankara
Varna
Bishkek
Florence
Kemer
Podgorica
Verona
The Golden Sands

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

In September, the weather in Banja Luka is typically warm. Average daily high temperature in September is about 22 degrees above zero. On average, Banja Luka has 11 rainy, 10 sunny, 6 partly cloudy, and 3 cloudy days in September. The rains are usually heavy.

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