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August weather forecast in Waterloo

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

	736 mmHg		77%
	5.3 m/s

27 July, Sunday. day, 28°; night, 19°; partly cloudy

28 July, mon

	736 mmHg		77%
	4.9 m/s

28 July, Monday. day, 28°; night, 19°; partly cloudy

29 July, tue

	737 mmHg		76%
	4.1 m/s

29 July, Tuesday. day, 27°; night, 18°; clear

30 July, wed

	738 mmHg		74%
	4.19 m/s

30 July, Wednesday. day, 27°; night, 18°; clear

31 July, thu

	738 mmHg		74%
	4.5 m/s

31 July, Thursday. day, 28°; night, 18°; clear

1 August, fri

	737 mmHg		73%
	4.5 m/s

1 August, Friday. day, 28°; night, 19°; clear

2 August, sat

	737 mmHg		74%
	4.69 m/s

2 August, Saturday. day, 28°; night, 19°; partly cloudy

3 August, sun

	737 mmHg		74%
	4.6 m/s

3 August, Sunday. day, 28°; night, 19°; clear

4 August, mon

	737 mmHg		75%
	4.69 m/s

4 August, Monday. day, 27°; night, 19°; rain

5 August, tue

	738 mmHg		75%
	4.9 m/s

5 August, Tuesday. day, 26°; night, 18°; overcast

6 August, wed

	737 mmHg		78%
	4.4 m/s

6 August, Wednesday. day, 27°; night, 18°; overcast

7 August, thu

	737 mmHg		77%
	4.8 m/s

7 August, Thursday. day, 27°; night, 18°; rain

8 August, fri

	737 mmHg		76%
	4.8 m/s

8 August, Friday. day, 27°; night, 18°; clear

9 August, sat

	737 mmHg		76%
	4.9 m/s

9 August, Saturday. day, 27°; night, 18°; clear

10 August, sun

	737 mmHg		76%
	4.6 m/s

10 August, Sunday. day, 27°; night, 18°; clear

11 August, mon

	737 mmHg		77%
	4.5 m/s

11 August, Monday. day, 26°; night, 17°; rain

12 August, tue

	737 mmHg		78%
	4.6 m/s

12 August, Tuesday. day, 26°; night, 17°; rain

13 August, wed

	737 mmHg		77%
	4.8 m/s

13 August, Wednesday. day, 26°; night, 17°; partly cloudy

14 August, thu

	738 mmHg		76%
	4.69 m/s

14 August, Thursday. day, 26°; night, 17°; clear

15 August, fri

	737 mmHg		76%
	4.8 m/s

15 August, Friday. day, 26°; night, 17°; partly cloudy

16 August, sat

	737 mmHg		76%
	4.8 m/s

16 August, Saturday. day, 26°; night, 17°; clear

17 August, sun

	737 mmHg		76%
	4.69 m/s

17 August, Sunday. day, 26°; night, 18°; rain

18 August, mon

	737 mmHg		78%
	4.6 m/s

18 August, Monday. day, 26°; night, 17°; rain

19 August, tue

	736 mmHg		77%
	4.9 m/s

19 August, Tuesday. day, 26°; night, 17°; rain

20 August, wed

	737 mmHg		77%
	5 m/s

20 August, Wednesday. day, 26°; night, 17°; rain

21 August, thu

	737 mmHg		76%
	5.1 m/s

21 August, Thursday. day, 26°; night, 18°; partly cloudy

22 August, fri

	738 mmHg		77%
	4.8 m/s

22 August, Friday. day, 26°; night, 17°; clear

23 August, sat

	738 mmHg		76%
	5.1 m/s

23 August, Saturday. day, 27°; night, 18°; clear

24 August, sun

	737 mmHg		76%
	5.7 m/s

24 August, Sunday. day, 27°; night, 18°; clear

25 August, mon

	737 mmHg		75%
	5.1 m/s

25 August, Monday. day, 27°; night, 18°; clear

26 August, tue

	737 mmHg		78%
	4.6 m/s

26 August, Tuesday. day, 27°; night, 18°; partly cloudy

27 August, wed

	737 mmHg		77%
	5.2 m/s

27 August, Wednesday. day, 27°; night, 18°; rain

28 August, thu

	737 mmHg		76%
	4.9 m/s

28 August, Thursday. day, 27°; night, 18°; rain

29 August, fri

	737 mmHg		77%
	5 m/s

29 August, Friday. day, 27°; night, 18°; clear

30 August, sat

	738 mmHg		73%
	4.8 m/s

30 August, Saturday. day, 26°; night, 17°; clear

31 August, sun

	738 mmHg		74%
	4.6 m/s

31 August, Sunday. day, 26°; night, 16°; clear

1 September, mon

	738 mmHg		74%
	5.1 m/s

1 September, Monday. day, 26°; night, 16°; clear

2 September, tue

	738 mmHg		72%
	4.9 m/s

2 September, Tuesday. day, 27°; night, 17°; clear

3 September, wed

	737 mmHg		73%
	5.3 m/s

3 September, Wednesday. day, 26°; night, 17°; clear

4 September, thu

	738 mmHg		71%
	5 m/s

4 September, Thursday. day, 26°; night, 16°; clear

5 September, fri

	738 mmHg		71%
	5.4 m/s

5 September, Friday. day, 26°; night, 16°; clear

6 September, sat

	738 mmHg		71%
	5.5 m/s

6 September, Saturday. day, 26°; night, 16°; clear

Average data for 10 years

Waterloo August

14

sunny days

10

days with precipitation

4

cloudy days

14 sunny days; 10 days with precipitation; 4 cloudy days;

76

%

air humidity

3.2

m/s

WindS

100

mm of precipitation

(11% of annual average)

air humidity 76%; 100 millimeters of precipitation (11% of annual average); Wind southerly 3.2 Meters per second

Weather graphs for August

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

S

S

S

S

S

S

S

S

S

SW

S

S

S

S

S

S

S

S

S

S

SW

S

S

S

SW

S

S

S

S

S

SE

1

Average data for 10 years

2

3

4

5

6

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8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

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27

28

29

30

31

Daytime temperature

Night-time temperature

Cities near you

Minneapolis
Minnetonka
Wisconsin Dells
Omaha
Dixon
New Ulm
Ottawa
Iowa City
Saint Paul

Cities with similar weather in August

Toronto
Rio de Janeiro
Boston
Marseilles
Balkhash
San Remo
Triest
Montpellier
Aix-en-Provence

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

In August, the weather in Waterloo is typically warm. Average daily high temperature in August is about 27 degrees above zero. On average, Waterloo has 14 sunny, 10 rainy, 5 partly cloudy, and 2 cloudy days in August. The rains are usually heavy.

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