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August weather forecast in Longmont

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

	613 mmHg		61%
	3.3 m/s

27 July, Sunday. day, 26°; night, 12°; rain

28 July, mon

	613 mmHg		64%
	3.2 m/s

28 July, Monday. day, 26°; night, 12°; rain

29 July, tue

	613 mmHg		64%
	3.4 m/s

29 July, Tuesday. day, 26°; night, 12°; rain

30 July, wed

	613 mmHg		62%
	3.5 m/s

30 July, Wednesday. day, 26°; night, 12°; clear

31 July, thu

	613 mmHg		61%
	3.3 m/s

31 July, Thursday. day, 26°; night, 12°; rain

1 August, fri

	614 mmHg		61%
	3.3 m/s

1 August, Friday. day, 26°; night, 12°; rain

2 August, sat

	613 mmHg		60%
	3.3 m/s

2 August, Saturday. day, 27°; night, 12°; rain

3 August, sun

	613 mmHg		62%
	3.3 m/s

3 August, Sunday. day, 26°; night, 13°; rain

4 August, mon

	613 mmHg		64%
	3.3 m/s

4 August, Monday. day, 26°; night, 12°; rain

5 August, tue

	613 mmHg		63%
	3.3 m/s

5 August, Tuesday. day, 25°; night, 12°; rain

6 August, wed

	613 mmHg		64%
	3.5 m/s

6 August, Wednesday. day, 26°; night, 12°; rain

7 August, thu

	612 mmHg		63%
	3.3 m/s

7 August, Thursday. day, 26°; night, 11°; rain

8 August, fri

	612 mmHg		61%
	3.4 m/s

8 August, Friday. day, 26°; night, 12°; clear

9 August, sat

	613 mmHg		61%
	3.2 m/s

9 August, Saturday. day, 26°; night, 12°; rain

10 August, sun

	613 mmHg		62%
	3.3 m/s

10 August, Sunday. day, 25°; night, 12°; rain

11 August, mon

	613 mmHg		60%
	3.2 m/s

11 August, Monday. day, 26°; night, 12°; clear

12 August, tue

	613 mmHg		58%
	3.3 m/s

12 August, Tuesday. day, 26°; night, 11°; clear

13 August, wed

	613 mmHg		58%
	3.5 m/s

13 August, Wednesday. day, 26°; night, 11°; clear

14 August, thu

	613 mmHg		60%
	3.4 m/s

14 August, Thursday. day, 26°; night, 11°; rain

15 August, fri

	612 mmHg		60%
	3.5 m/s

15 August, Friday. day, 26°; night, 11°; clear

16 August, sat

	612 mmHg		61%
	3.4 m/s

16 August, Saturday. day, 25°; night, 11°; rain

17 August, sun

	613 mmHg		60%
	3.4 m/s

17 August, Sunday. day, 26°; night, 11°; clear

18 August, mon

	612 mmHg		58%
	3.3 m/s

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

19 August, tue

	612 mmHg		61%
	3.7 m/s

19 August, Tuesday. day, 25°; night, 11°; rain

20 August, wed

	612 mmHg		61%
	3.2 m/s

20 August, Wednesday. day, 25°; night, 11°; rain

21 August, thu

	612 mmHg		58%
	3.3 m/s

21 August, Thursday. day, 26°; night, 11°; partly cloudy

22 August, fri

	612 mmHg		58%
	3.4 m/s

22 August, Friday. day, 26°; night, 12°; partly cloudy

23 August, sat

	612 mmHg		61%
	3.4 m/s

23 August, Saturday. day, 26°; night, 11°; rain

24 August, sun

	612 mmHg		58%
	3.2 m/s

24 August, Sunday. day, 26°; night, 11°; partly cloudy

25 August, mon

	612 mmHg		60%
	3.4 m/s

25 August, Monday. day, 26°; night, 11°; clear

26 August, tue

	612 mmHg		60%
	3.2 m/s

26 August, Tuesday. day, 26°; night, 11°; rain

27 August, wed

	612 mmHg		60%
	3.3 m/s

27 August, Wednesday. day, 25°; night, 11°; rain

28 August, thu

	612 mmHg		61%
	3.3 m/s

28 August, Thursday. day, 25°; night, 10°; rain

29 August, fri

	612 mmHg		61%
	3.3 m/s

29 August, Friday. day, 25°; night, 10°; clear

30 August, sat

	612 mmHg		58%
	3.4 m/s

30 August, Saturday. day, 26°; night, 10°; clear

31 August, sun

	611 mmHg		58%
	3.4 m/s

31 August, Sunday. day, 26°; night, 10°; clear

1 September, mon

	611 mmHg		58%
	3.3 m/s

1 September, Monday. day, 25°; night, 10°; rain

2 September, tue

	612 mmHg		57%
	3.3 m/s

2 September, Tuesday. day, 25°; night, 10°; clear

3 September, wed

	612 mmHg		57%
	3.2 m/s

3 September, Wednesday. day, 25°; night, 10°; clear

4 September, thu

	612 mmHg		58%
	3.2 m/s

4 September, Thursday. day, 25°; night, 10°; clear

5 September, fri

	612 mmHg		58%
	3.4 m/s

5 September, Friday. day, 25°; night, 10°; rain

6 September, sat

	612 mmHg		58%
	3.5 m/s

6 September, Saturday. day, 25°; night, 10°; rain

Average data for 10 years

Longmont August

10

sunny days

18

days with precipitation

2

cloudy days

10 sunny days; 18 days with precipitation; 2 cloudy days;

61

%

air humidity

1.9

m/s

WindSW

81

mm of precipitation

(11% of annual average)

air humidity 61%; 81 millimeters of precipitation (11% of annual average); Wind south-westerly 1.9 Meters per second

Weather graphs for August

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

S

SW

SW

SW

S

SW

SW

SW

S

SW

SW

SW

S

S

SW

S

S

SW

S

SW

SW

SW

SW

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

Denver
Colorado Springs
Breckenridge
Lakewood
Steamboat Springs
Telluride
Aspen
Fort Collins
Aurora

Cities with similar weather in August

Toronto
Rio de Janeiro
Genoa
Bordeaux
San Remo
Como
El-Aaiún
Portimão
Milwaukee

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

In August, the weather in Longmont is typically warm. Average daily high temperature in August is about 26 degrees above zero. On average, Longmont has 18 rainy, 10 sunny, and 3 partly cloudy days in August. The rains are usually heavy. August as well as January, February, May, and June is considered the most uncomfortable time to visit Longmont.

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