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September weather forecast in Terceira Island

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

	748 mmHg		79%
	6.4 m/s		+23

31 August, Sunday. day, 22°; night, 21°; rain

1 September, mon

	747 mmHg		79%
	6.8 m/s		+23

1 September, Monday. day, 22°; night, 21°; clear

2 September, tue

	747 mmHg		79%
	7.2 m/s		+23

2 September, Tuesday. day, 22°; night, 21°; clear

3 September, wed

	747 mmHg		79%
	6.7 m/s		+23

3 September, Wednesday. day, 22°; night, 21°; rain

4 September, thu

	747 mmHg		79%
	7.5 m/s		+24

4 September, Thursday. day, 22°; night, 21°; partly cloudy

5 September, fri

	747 mmHg		81%
	8.5 m/s		+23

5 September, Friday. day, 22°; night, 21°; rain

6 September, sat

	747 mmHg		78%
	8 m/s		+23

6 September, Saturday. day, 21°; night, 21°; clear

7 September, sun

	746 mmHg		77%
	7.8 m/s		+23

7 September, Sunday. day, 22°; night, 21°; clear

8 September, mon

	746 mmHg		77%
	7.4 m/s		+23

8 September, Monday. day, 22°; night, 21°; clear

9 September, tue

	747 mmHg		78%
	7.8 m/s		+23

9 September, Tuesday. day, 22°; night, 21°; rain

10 September, wed

	746 mmHg		80%
	8.1 m/s		+23

10 September, Wednesday. day, 22°; night, 21°; rain

11 September, thu

	747 mmHg		78%
	8.39 m/s		+23

11 September, Thursday. day, 21°; night, 21°; rain

12 September, fri

	747 mmHg		78%
	8.3 m/s		+23

12 September, Friday. day, 22°; night, 21°; partly cloudy

13 September, sat

	747 mmHg		79%
	7.6 m/s		+23

13 September, Saturday. day, 21°; night, 21°; partly cloudy

14 September, sun

	747 mmHg		79%
	7.2 m/s		+23

14 September, Sunday. day, 22°; night, 21°; rain

15 September, mon

	746 mmHg		80%
	8.5 m/s		+22

15 September, Monday. day, 21°; night, 20°; rain

16 September, tue

	746 mmHg		76%
	8.6 m/s		+22

16 September, Tuesday. day, 21°; night, 20°; partly cloudy

17 September, wed

	747 mmHg		77%
	7.7 m/s		+22

17 September, Wednesday. day, 21°; night, 20°; overcast

18 September, thu

	746 mmHg		79%
	7.8 m/s		+22

18 September, Thursday. day, 21°; night, 20°; rain

19 September, fri

	746 mmHg		78%
	7.8 m/s		+22

19 September, Friday. day, 21°; night, 20°; partly cloudy

20 September, sat

	746 mmHg		77%
	7.9 m/s		+22

20 September, Saturday. day, 21°; night, 20°; partly cloudy

21 September, sun

	746 mmHg		75%
	8 m/s		+22

21 September, Sunday. day, 21°; night, 20°; clear

22 September, mon

	746 mmHg		78%
	8.2 m/s		+22

22 September, Monday. day, 21°; night, 20°; clear

23 September, tue

	747 mmHg		77%
	7.7 m/s		+22

23 September, Tuesday. day, 21°; night, 20°; partly cloudy

24 September, wed

	747 mmHg		75%
	7.6 m/s		+22

24 September, Wednesday. day, 21°; night, 20°; clear

25 September, thu

	746 mmHg		77%
	8.5 m/s		+22

25 September, Thursday. day, 21°; night, 20°; rain

26 September, fri

	745 mmHg		78%
	8.5 m/s		+22

26 September, Friday. day, 21°; night, 20°; partly cloudy

27 September, sat

	745 mmHg		81%
	8.7 m/s		+22

27 September, Saturday. day, 21°; night, 20°; partly cloudy

28 September, sun

	746 mmHg		83%
	8.5 m/s		+22

28 September, Sunday. day, 21°; night, 20°; rain

29 September, mon

	746 mmHg		80%
	8.6 m/s		+22

29 September, Monday. day, 21°; night, 20°; rain

30 September, tue

	746 mmHg		79%
	8 m/s		+22

30 September, Tuesday. day, 20°; night, 20°; overcast

1 October, wed

	746 mmHg		80%
	9.1 m/s		+22

1 October, Wednesday. day, 21°; night, 20°; rain

2 October, thu

	746 mmHg		77%
	9.1 m/s		+22

2 October, Thursday. day, 20°; night, 20°; clear

3 October, fri

	746 mmHg		77%
	8.39 m/s		+22

3 October, Friday. day, 21°; night, 20°; partly cloudy

4 October, sat

	745 mmHg		81%
	9.1 m/s		+22

4 October, Saturday. day, 21°; night, 20°; clear

Average data for 10 years

Terceira Island September

8

sunny days

11

days with precipitation

4

cloudy days

8 sunny days; 11 days with precipitation; 4 cloudy days;

78

%

air humidity

6.2

m/s

WindS

54

mm of precipitation

(7% of annual average)

+22

°C

Water temperature

air humidity 78%; 54 millimeters of precipitation (7% of annual average); Wind southerly 6.2 Meters per second; Water temperature +22°

Weather graphs for September

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

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S

SE

S

S

S

S

S

S

S

SE

S

S

S

S

S

S

S

S

S

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

24

25

26

27

28

29

30

Daytime temperature

Night-time temperature

Cities near you

Funchal
Ponta Delgada
Santa Cruz de la Palma
Porto Moniz
Calheta
El Hierro
Santa Cruz das Flores
Ponta do Sol
Santa Maria

Cities with similar weather in September

Lisbon
Burgas
Tivat
The Sunny Beach
Porto
Pomorie
Genoa
Herceg Novi
Marseilles

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

In September, the weather in Terceira Island is typically warm. Average daily high temperature in September is about 21 degrees above zero. On average, Terceira Island has 11 rainy, 9 partly cloudy, 8 sunny, and 2 cloudy days in September. The rains are usually moderate.

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