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August weather forecast in Spearfish

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

	678 mmHg		52%
	5.1 m/s

27 July, Sunday. day, 31°; night, 16°; rain

28 July, mon

	678 mmHg		55%
	5.4 m/s

28 July, Monday. day, 30°; night, 15°; rain

29 July, tue

	679 mmHg		55%
	5.5 m/s

29 July, Tuesday. day, 30°; night, 15°; rain

30 July, wed

	678 mmHg		54%
	5.2 m/s

30 July, Wednesday. day, 31°; night, 15°; clear

31 July, thu

	678 mmHg		51%
	5.2 m/s

31 July, Thursday. day, 32°; night, 16°; clear

1 August, fri

	679 mmHg		51%
	5 m/s

1 August, Friday. day, 31°; night, 16°; clear

2 August, sat

	678 mmHg		51%
	5.3 m/s

2 August, Saturday. day, 31°; night, 16°; rain

3 August, sun

	678 mmHg		56%
	5.6 m/s

3 August, Sunday. day, 30°; night, 16°; rain

4 August, mon

	679 mmHg		61%
	5.4 m/s

4 August, Monday. day, 29°; night, 16°; rain

5 August, tue

	679 mmHg		60%
	5.2 m/s

5 August, Tuesday. day, 30°; night, 15°; partly cloudy

6 August, wed

	678 mmHg		58%
	5.8 m/s

6 August, Wednesday. day, 30°; night, 15°; partly cloudy

7 August, thu

	677 mmHg		55%
	4.9 m/s

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

8 August, fri

	677 mmHg		55%
	5.1 m/s

8 August, Friday. day, 30°; night, 16°; rain

9 August, sat

	678 mmHg		56%
	5.6 m/s

9 August, Saturday. day, 29°; night, 15°; rain

10 August, sun

	679 mmHg		54%
	5.3 m/s

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

11 August, mon

	678 mmHg		56%
	5.2 m/s

11 August, Monday. day, 30°; night, 15°; clear

12 August, tue

	678 mmHg		56%
	5.2 m/s

12 August, Tuesday. day, 30°; night, 15°; clear

13 August, wed

	679 mmHg		54%
	5.3 m/s

13 August, Wednesday. day, 29°; night, 14°; clear

14 August, thu

	678 mmHg		52%
	5.7 m/s

14 August, Thursday. day, 30°; night, 15°; partly cloudy

15 August, fri

	677 mmHg		55%
	5.4 m/s

15 August, Friday. day, 29°; night, 15°; clear

16 August, sat

	678 mmHg		52%
	5.2 m/s

16 August, Saturday. day, 29°; night, 14°; clear

17 August, sun

	678 mmHg		50%
	5.3 m/s

17 August, Sunday. day, 30°; night, 14°; clear

18 August, mon

	677 mmHg		54%
	5.7 m/s

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

19 August, tue

	677 mmHg		56%
	5.3 m/s

19 August, Tuesday. day, 29°; night, 13°; partly cloudy

20 August, wed

	677 mmHg		52%
	5.5 m/s

20 August, Wednesday. day, 29°; night, 14°; clear

21 August, thu

	677 mmHg		51%
	5.4 m/s

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

22 August, fri

	677 mmHg		51%
	5.9 m/s

22 August, Friday. day, 31°; night, 15°; clear

23 August, sat

	677 mmHg		50%
	6 m/s

23 August, Saturday. day, 31°; night, 15°; partly cloudy

24 August, sun

	677 mmHg		49%
	6 m/s

24 August, Sunday. day, 30°; night, 15°; clear

25 August, mon

	678 mmHg		51%
	5.4 m/s

25 August, Monday. day, 29°; night, 14°; clear

26 August, tue

	678 mmHg		55%
	5.4 m/s

26 August, Tuesday. day, 29°; night, 14°; partly cloudy

27 August, wed

	677 mmHg		54%
	5.3 m/s

27 August, Wednesday. day, 29°; night, 15°; partly cloudy

28 August, thu

	678 mmHg		52%
	5.5 m/s

28 August, Thursday. day, 29°; night, 14°; clear

29 August, fri

	678 mmHg		52%
	5 m/s

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

30 August, sat

	677 mmHg		51%
	5.6 m/s

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

31 August, sun

	677 mmHg		51%
	6.1 m/s

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

1 September, mon

	677 mmHg		50%
	5.7 m/s

1 September, Monday. day, 30°; night, 13°; clear

2 September, tue

	677 mmHg		48%
	5.9 m/s

2 September, Tuesday. day, 29°; night, 14°; clear

3 September, wed

	678 mmHg		46%
	5.5 m/s

3 September, Wednesday. day, 29°; night, 13°; clear

4 September, thu

	677 mmHg		49%
	5.5 m/s

4 September, Thursday. day, 29°; night, 14°; clear

5 September, fri

	677 mmHg		49%
	5.5 m/s

5 September, Friday. day, 29°; night, 13°; clear

6 September, sat

	678 mmHg		50%
	5.6 m/s

6 September, Saturday. day, 28°; night, 13°; rain

Average data for 10 years

Spearfish August

17

sunny days

6

days with precipitation

1

cloudy day

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

54

%

air humidity

3.1

m/s

WindS

35

mm of precipitation

(8% of annual average)

air humidity 54%; 35 millimeters of precipitation (8% of annual average); Wind southerly 3.1 Meters per second

Weather graphs for August

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

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S

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S

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SW

S

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S

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S

S

S

S

S

S

S

1

Average data for 10 years

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Daytime temperature

Night-time temperature

Cities near you

Denver
Colorado Springs
Breckenridge
Huron
Billings
Cody
Lakewood
Williston
Aberdeen

Cities with similar weather in August

Lisbon
Porto
Genoa
Playa de las Americas
Montreal
Bordeaux
Adeje
Talas
Colorado Springs

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

In August, the weather in Spearfish is typically hot. Average daily high temperature in August is about 30 degrees above zero. On average, Spearfish has 17 sunny, 8 partly cloudy, and 6 rainy days in August. The rains are usually moderate.

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