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August weather forecast in Derry

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

27 July, sun

	748 mmHg		82%
	5.6 m/s		+16

27 July, Sunday. day, 17°; night, 13°; rain

28 July, mon

	748 mmHg		84%
	6.1 m/s		+16

28 July, Monday. day, 17°; night, 12°; rain

29 July, tue

	748 mmHg		82%
	6.6 m/s		+17

29 July, Tuesday. day, 17°; night, 13°; rain

30 July, wed

	749 mmHg		83%
	6.2 m/s		+16

30 July, Wednesday. day, 17°; night, 12°; rain

31 July, thu

	748 mmHg		83%
	6.5 m/s		+16

31 July, Thursday. day, 17°; night, 12°; rain

1 August, fri

	748 mmHg		82%
	6.3 m/s		+16

1 August, Friday. day, 17°; night, 12°; partly cloudy

2 August, sat

	748 mmHg		83%
	6.7 m/s		+17

2 August, Saturday. day, 17°; night, 13°; rain

3 August, sun

	748 mmHg		84%
	6.6 m/s		+17

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

4 August, mon

	749 mmHg		83%
	6.5 m/s		+17

4 August, Monday. day, 17°; night, 13°; partly cloudy

5 August, tue

	749 mmHg		82%
	6.3 m/s		+16

5 August, Tuesday. day, 17°; night, 13°; rain

6 August, wed

	749 mmHg		84%
	6.1 m/s		+17

6 August, Wednesday. day, 17°; night, 13°; rain

7 August, thu

	750 mmHg		83%
	5.9 m/s		+16

7 August, Thursday. day, 17°; night, 12°; clear

8 August, fri

	750 mmHg		81%
	6.2 m/s		+16

8 August, Friday. day, 17°; night, 12°; partly cloudy

9 August, sat

	750 mmHg		81%
	6.4 m/s		+16

9 August, Saturday. day, 17°; night, 13°; overcast

10 August, sun

	750 mmHg		82%
	6.1 m/s		+16

10 August, Sunday. day, 18°; night, 12°; partly cloudy

11 August, mon

	749 mmHg		84%
	6.5 m/s		+16

11 August, Monday. day, 18°; night, 13°; rain

12 August, tue

	749 mmHg		84%
	6.7 m/s		+17

12 August, Tuesday. day, 17°; night, 13°; rain

13 August, wed

	749 mmHg		83%
	6.2 m/s		+16

13 August, Wednesday. day, 17°; night, 13°; rain

14 August, thu

	749 mmHg		85%
	5.9 m/s		+17

14 August, Thursday. day, 17°; night, 12°; rain

15 August, fri

	749 mmHg		82%
	6.5 m/s		+16

15 August, Friday. day, 17°; night, 12°; rain

16 August, sat

	748 mmHg		82%
	7 m/s		+17

16 August, Saturday. day, 17°; night, 13°; rain

17 August, sun

	746 mmHg		82%
	6.7 m/s		+16

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

18 August, mon

	746 mmHg		83%
	6.6 m/s		+16

18 August, Monday. day, 17°; night, 13°; rain

19 August, tue

	746 mmHg		82%
	7.3 m/s		+17

19 August, Tuesday. day, 17°; night, 13°; rain

20 August, wed

	748 mmHg		81%
	7 m/s		+17

20 August, Wednesday. day, 17°; night, 13°; rain

21 August, thu

	749 mmHg		83%
	7 m/s		+17

21 August, Thursday. day, 17°; night, 12°; rain

22 August, fri

	750 mmHg		82%
	6.1 m/s		+16

22 August, Friday. day, 17°; night, 12°; rain

23 August, sat

	748 mmHg		84%
	6.1 m/s		+17

23 August, Saturday. day, 16°; night, 12°; rain

24 August, sun

	748 mmHg		80%
	6.4 m/s		+17

24 August, Sunday. day, 17°; night, 11°; clear

25 August, mon

	748 mmHg		83%
	6.6 m/s		+17

25 August, Monday. day, 16°; night, 12°; rain

26 August, tue

	749 mmHg		84%
	6.3 m/s		+16

26 August, Tuesday. day, 16°; night, 12°; partly cloudy

27 August, wed

	750 mmHg		83%
	6.9 m/s		+15

27 August, Wednesday. day, 16°; night, 12°; rain

28 August, thu

	750 mmHg		82%
	6.9 m/s		+15

28 August, Thursday. day, 16°; night, 12°; overcast

29 August, fri

	751 mmHg		81%
	7.3 m/s		+16

29 August, Friday. day, 16°; night, 12°; rain

30 August, sat

	753 mmHg		81%
	6.2 m/s		+15

30 August, Saturday. day, 16°; night, 11°; overcast

31 August, sun

	752 mmHg		81%
	6.2 m/s		+16

31 August, Sunday. day, 16°; night, 11°; overcast

1 September, mon

	752 mmHg		82%
	6.6 m/s		+16

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

2 September, tue

	751 mmHg		83%
	6.2 m/s		+16

2 September, Tuesday. day, 17°; night, 12°; overcast

3 September, wed

	750 mmHg		83%
	6.5 m/s		+16

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

4 September, thu

	751 mmHg		84%
	6.7 m/s		+15

4 September, Thursday. day, 17°; night, 12°; rain

5 September, fri

	751 mmHg		83%
	7 m/s		+15

5 September, Friday. day, 16°; night, 12°; rain

6 September, sat

	750 mmHg		83%
	7.4 m/s		+14

6 September, Saturday. day, 16°; night, 12°; rain

Average data for 10 years

Derry August

2

sunny days

20

days with precipitation

14

cloudy days

2 sunny days; 20 days with precipitation; 14 cloudy days;

83

%

air humidity

4.8

m/s

WindSW

101

mm of precipitation

(10% of annual average)

+16

°C

Water temperature

air humidity 83%; 101 millimeters of precipitation (10% of annual average); Wind south-westerly 4.8 Meters per second; Water temperature +16°

Weather graphs for August

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

S

S

SW

SW

SW

SW

SW

S

SW

SW

SW

SW

SW

SW

SW

SW

S

S

SW

SW

SW

SW

S

SW

SW

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

31

Daytime temperature

Night-time temperature

Cities near you

Dublin
Carrickfinn
Glasgow
Galway
Cork
Wicklow
Fort William
Ennis
Belfast

Cities with similar weather in August

Cholpon-Ata
Sydney
Reykyavik
Oslo
San Francisco
Buenos Aires
Melbourne
Wellington
Auckland

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

August in Derry is the warmest month of the year. In August, the weather in Derry is typically warm. Average daily high temperature in August is about 17 degrees above zero. On average, Derry has 20 rainy, 5 partly cloudy, 4 cloudy, and 2 sunny days in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Derry.

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