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September weather forecast in Dorchester

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

	756 mmHg		81%
	5.2 m/s		+17

31 August, Sunday. day, 19°; night, 12°; partly cloudy

1 September, mon

	756 mmHg		79%
	4.8 m/s		+17

1 September, Monday. day, 19°; night, 12°; partly cloudy

2 September, tue

	755 mmHg		82%
	5 m/s		+17

2 September, Tuesday. day, 19°; night, 12°; partly cloudy

3 September, wed

	754 mmHg		82%
	5.4 m/s		+17

3 September, Wednesday. day, 19°; night, 12°; overcast

4 September, thu

	754 mmHg		82%
	5.2 m/s		+17

4 September, Thursday. day, 19°; night, 12°; partly cloudy

5 September, fri

	754 mmHg		82%
	5.5 m/s		+17

5 September, Friday. day, 19°; night, 12°; rain

6 September, sat

	753 mmHg		83%
	5.5 m/s		+17

6 September, Saturday. day, 19°; night, 12°; rain

7 September, sun

	753 mmHg		82%
	5.5 m/s		+17

7 September, Sunday. day, 19°; night, 12°; overcast

8 September, mon

	753 mmHg		82%
	5.5 m/s		+17

8 September, Monday. day, 19°; night, 12°; overcast

9 September, tue

	753 mmHg		83%
	5.6 m/s		+17

9 September, Tuesday. day, 18°; night, 12°; partly cloudy

10 September, wed

	753 mmHg		83%
	5.9 m/s		+17

10 September, Wednesday. day, 18°; night, 12°; rain

11 September, thu

	753 mmHg		83%
	5.8 m/s		+17

11 September, Thursday. day, 18°; night, 12°; overcast

12 September, fri

	754 mmHg		82%
	5.7 m/s		+17

12 September, Friday. day, 18°; night, 11°; overcast

13 September, sat

	754 mmHg		81%
	5.7 m/s		+17

13 September, Saturday. day, 18°; night, 11°; clear

14 September, sun

	754 mmHg		81%
	5.6 m/s		+17

14 September, Sunday. day, 18°; night, 11°; clear

15 September, mon

	754 mmHg		82%
	5.4 m/s		+17

15 September, Monday. day, 18°; night, 10°; partly cloudy

16 September, tue

	753 mmHg		80%
	5.8 m/s		+16

16 September, Tuesday. day, 18°; night, 11°; clear

17 September, wed

	753 mmHg		80%
	5.6 m/s		+16

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

18 September, thu

	753 mmHg		82%
	6 m/s		+16

18 September, Thursday. day, 17°; night, 10°; clear

19 September, fri

	754 mmHg		84%
	5.8 m/s		+17

19 September, Friday. day, 18°; night, 11°; overcast

20 September, sat

	754 mmHg		84%
	5.8 m/s		+17

20 September, Saturday. day, 18°; night, 12°; partly cloudy

21 September, sun

	754 mmHg		82%
	5.3 m/s		+17

21 September, Sunday. day, 18°; night, 11°; clear

22 September, mon

	754 mmHg		85%
	5.3 m/s		+16

22 September, Monday. day, 17°; night, 10°; partly cloudy

23 September, tue

	753 mmHg		84%
	6 m/s		+16

23 September, Tuesday. day, 17°; night, 10°; partly cloudy

24 September, wed

	752 mmHg		83%
	6 m/s		+16

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

25 September, thu

	753 mmHg		84%
	5.3 m/s		+16

25 September, Thursday. day, 17°; night, 10°; rain

26 September, fri

	753 mmHg		85%
	6.1 m/s		+16

26 September, Friday. day, 17°; night, 10°; rain

27 September, sat

	753 mmHg		85%
	6.4 m/s		+16

27 September, Saturday. day, 16°; night, 10°; rain

28 September, sun

	754 mmHg		85%
	5.9 m/s		+16

28 September, Sunday. day, 16°; night, 10°; rain

29 September, mon

	753 mmHg		85%
	5.9 m/s		+16

29 September, Monday. day, 16°; night, 10°; rain

30 September, tue

	751 mmHg		87%
	6.6 m/s		+16

30 September, Tuesday. day, 16°; night, 11°; rain

1 October, wed

	750 mmHg		85%
	6.8 m/s		+16

1 October, Wednesday. day, 16°; night, 11°; rain

2 October, thu

	751 mmHg		85%
	6.1 m/s		+16

2 October, Thursday. day, 16°; night, 10°; rain

3 October, fri

	752 mmHg		85%
	6.4 m/s		+16

3 October, Friday. day, 15°; night, 10°; clear

4 October, sat

	752 mmHg		84%
	6.7 m/s		+16

4 October, Saturday. day, 15°; night, 9°; overcast

Average data for 10 years

Dorchester September

6

sunny days

10

days with precipitation

9

cloudy days

6 sunny days; 10 days with precipitation; 9 cloudy days;

83

%

air humidity

4.1

m/s

WindS

61

mm of precipitation

(8% of annual average)

+17

°C

Water temperature

air humidity 83%; 61 millimeters of precipitation (8% of annual average); Wind southerly 4.1 Meters per second; Water temperature +17°

Weather graphs for September

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

SW

S

S

S

S

SW

S

S

S

S

SW

SW

SW

S

SW

S

S

S

S

S

S

S

S

S

SW

SW

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

London
Manchester
Brest
Liverpool
Trowbridge
Oxford
Le Havre
Rouen
Bournemouth

Cities with similar weather in September

Helsinki
Riga
Tallinn
Stockholm
Sydney
Yurmala
Palanga
Dublin
Buenos Aires

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

In September, the weather in Dorchester is typically warm. Average daily high temperature in September is about 18 degrees above zero. On average, Dorchester has 10 rainy, 8 partly cloudy, 6 sunny, and 6 cloudy days in September. The rains are usually moderate.

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