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August weather forecast in Great Falls

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

	668 mmHg		42%
	5.6 m/s

27 July, Sunday. day, 31°; night, 15°; clear

28 July, mon

	668 mmHg		41%
	5.7 m/s

28 July, Monday. day, 31°; night, 15°; clear

29 July, tue

	668 mmHg		39%
	5.6 m/s

29 July, Tuesday. day, 31°; night, 16°; clear

30 July, wed

	668 mmHg		38%
	5.7 m/s

30 July, Wednesday. day, 32°; night, 15°; clear

31 July, thu

	668 mmHg		38%
	5.9 m/s

31 July, Thursday. day, 32°; night, 15°; clear

1 August, fri

	668 mmHg		39%
	5.7 m/s

1 August, Friday. day, 32°; night, 15°; clear

2 August, sat

	668 mmHg		41%
	5.9 m/s

2 August, Saturday. day, 32°; night, 16°; partly cloudy

3 August, sun

	668 mmHg		45%
	6.1 m/s

3 August, Sunday. day, 30°; night, 15°; partly cloudy

4 August, mon

	668 mmHg		44%
	5.8 m/s

4 August, Monday. day, 30°; night, 14°; clear

5 August, tue

	668 mmHg		48%
	5.3 m/s

5 August, Tuesday. day, 30°; night, 14°; clear

6 August, wed

	667 mmHg		45%
	5.5 m/s

6 August, Wednesday. day, 30°; night, 14°; rain

7 August, thu

	667 mmHg		46%
	5.7 m/s

7 August, Thursday. day, 30°; night, 15°; rain

8 August, fri

	667 mmHg		47%
	5.7 m/s

8 August, Friday. day, 29°; night, 14°; rain

9 August, sat

	668 mmHg		46%
	5.8 m/s

9 August, Saturday. day, 29°; night, 13°; partly cloudy

10 August, sun

	668 mmHg		44%
	5.1 m/s

10 August, Sunday. day, 29°; night, 14°; clear

11 August, mon

	667 mmHg		45%
	5.4 m/s

11 August, Monday. day, 30°; night, 14°; rain

12 August, tue

	668 mmHg		44%
	5.3 m/s

12 August, Tuesday. day, 29°; night, 14°; clear

13 August, wed

	669 mmHg		46%
	5.3 m/s

13 August, Wednesday. day, 29°; night, 13°; partly cloudy

14 August, thu

	668 mmHg		43%
	5.2 m/s

14 August, Thursday. day, 30°; night, 14°; clear

15 August, fri

	667 mmHg		43%
	5.2 m/s

15 August, Friday. day, 30°; night, 13°; clear

16 August, sat

	668 mmHg		44%
	5.7 m/s

16 August, Saturday. day, 29°; night, 13°; clear

17 August, sun

	668 mmHg		46%
	5.3 m/s

17 August, Sunday. day, 29°; night, 13°; partly cloudy

18 August, mon

	667 mmHg		46%
	5.8 m/s

18 August, Monday. day, 29°; night, 14°; partly cloudy

19 August, tue

	667 mmHg		45%
	5.5 m/s

19 August, Tuesday. day, 29°; night, 13°; clear

20 August, wed

	667 mmHg		43%
	5.7 m/s

20 August, Wednesday. day, 28°; night, 13°; clear

21 August, thu

	667 mmHg		45%
	5.3 m/s

21 August, Thursday. day, 29°; night, 13°; clear

22 August, fri

	667 mmHg		45%
	5.8 m/s

22 August, Friday. day, 29°; night, 13°; clear

23 August, sat

	666 mmHg		43%
	5.9 m/s

23 August, Saturday. day, 29°; night, 14°; partly cloudy

24 August, sun

	667 mmHg		46%
	6.4 m/s

24 August, Sunday. day, 28°; night, 13°; rain

25 August, mon

	667 mmHg		45%
	5.6 m/s

25 August, Monday. day, 28°; night, 12°; clear

26 August, tue

	667 mmHg		44%
	5.3 m/s

26 August, Tuesday. day, 28°; night, 12°; clear

27 August, wed

	667 mmHg		42%
	5.7 m/s

27 August, Wednesday. day, 29°; night, 12°; clear

28 August, thu

	667 mmHg		42%
	5.9 m/s

28 August, Thursday. day, 29°; night, 12°; clear

29 August, fri

	667 mmHg		44%
	6.1 m/s

29 August, Friday. day, 29°; night, 12°; clear

30 August, sat

	666 mmHg		43%
	5.8 m/s

30 August, Saturday. day, 29°; night, 13°; rain

31 August, sun

	666 mmHg		44%
	6.1 m/s

31 August, Sunday. day, 28°; night, 12°; clear

1 September, mon

	666 mmHg		43%
	6.2 m/s

1 September, Monday. day, 27°; night, 12°; clear

2 September, tue

	667 mmHg		43%
	6.2 m/s

2 September, Tuesday. day, 27°; night, 11°; clear

3 September, wed

	667 mmHg		42%
	5.9 m/s

3 September, Wednesday. day, 28°; night, 11°; clear

4 September, thu

	667 mmHg		44%
	5.8 m/s

4 September, Thursday. day, 27°; night, 12°; partly cloudy

5 September, fri

	667 mmHg		49%
	5.6 m/s

5 September, Friday. day, 26°; night, 11°; clear

6 September, sat

	668 mmHg		51%
	5.7 m/s

6 September, Saturday. day, 25°; night, 11°; clear

Average data for 10 years

Great Falls August

18

sunny days

6

days with precipitation

1

cloudy day

18 sunny days; 6 days with precipitation; 1 cloudy day;

44

%

air humidity

3.2

m/s

WindS

31

mm of precipitation

(8% of annual average)

air humidity 44%; 31 millimeters of precipitation (8% 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

S

SW

S

S

SW

SW

S

S

S

SW

S

S

SW

SW

SW

S

SW

SW

SW

S

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

Calgary
Moscow
West Yellowstone
Medicine Hat
Bozeman
Billings
Cody
Jackson
Missoula

Cities with similar weather in August

Bishkek
Sofia
Toronto
Genoa
San Remo
Como
Rijeka
Kayseri
Milwaukee

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

In August, the weather in Great Falls is typically hot. Average daily high temperature in August is about 29 degrees above zero. On average, Great Falls has 18 sunny, 7 partly cloudy, and 6 rainy days in August. The rains are usually light.

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