WorldArrow icon
Arrow iconSan Marcos

Air quality in San Marcos

Air quality index (AQI⁺) and PM2.5 air pollution in San Marcos • 13 Followers • 13:00, May 09 Local time

43*

US AQI⁺

Good

face expression based on aqi value

Main pollutant:

PM2.5

7.9 µg/m³

weather condition icon

18°

wind direction icon

8 km/h

weather humid icon

56 %

Hourly forecast

San Marcos air quality index (AQI⁺) forecast

Now

43

Weather icon

18°

IQAir AirVisual Air Quality Map Wind rotating 67 degree

8

km/h

Humidity icon

56%

16:00

45

Weather icon

18°

IQAir AirVisual Air Quality Map Wind rotating 31 degree

11

km/h

Humidity icon

56%

17:00

46

Weather icon

17°

IQAir AirVisual Air Quality Map Wind rotating 22 degree

13

km/h

Humidity icon

64%

18:00

47

Weather icon

80%

13°

IQAir AirVisual Air Quality Map Wind rotating 22 degree

8

km/h

Humidity icon

84%

19:00

46

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 43 degree

6

km/h

Humidity icon

91%

20:00

46

Weather icon

80%

11°

IQAir AirVisual Air Quality Map Wind rotating 47 degree

4

km/h

Humidity icon

95%

21:00

46

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 62 degree

5

km/h

Humidity icon

96%

22:00

48

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 80 degree

3

km/h

Humidity icon

97%

23:00

48

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 73 degree

4

km/h

Humidity icon

98%

Sun

00:00

49

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 72 degree

4

km/h

Humidity icon

98%

01:00

53

Weather icon

9°

IQAir AirVisual Air Quality Map Wind rotating 94 degree

3

km/h

Humidity icon

99%

02:00

53

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 95 degree

3

km/h

Humidity icon

98%

03:00

53

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 117 degree

4

km/h

Humidity icon

97%

04:00

52

Weather icon

9°

IQAir AirVisual Air Quality Map Wind rotating 119 degree

6

km/h

Humidity icon

96%

05:00

52

Weather icon

9°

IQAir AirVisual Air Quality Map Wind rotating 142 degree

6

km/h

Humidity icon

95%

06:00

52

Weather icon

9°

IQAir AirVisual Air Quality Map Wind rotating 148 degree

8

km/h

Humidity icon

94%

07:00

52

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 136 degree

7

km/h

Humidity icon

92%

08:00

52

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 89 degree

5

km/h

Humidity icon

82%

09:00

52

Weather icon

14°

IQAir AirVisual Air Quality Map Wind rotating 51 degree

8

km/h

Humidity icon

71%

10:00

47

Weather icon

16°

IQAir AirVisual Air Quality Map Wind rotating 34 degree

10

km/h

Humidity icon

63%

11:00

47

Weather icon

17°

IQAir AirVisual Air Quality Map Wind rotating 25 degree

12

km/h

Humidity icon

55%

12:00

47

Weather icon

18°

IQAir AirVisual Air Quality Map Wind rotating 12 degree

14

km/h

Humidity icon

51%

13:00

24

Weather icon

19°

IQAir AirVisual Air Quality Map Wind rotating 20 degree

14

km/h

Humidity icon

49%

14:00

24

Weather icon

19°

IQAir AirVisual Air Quality Map Wind rotating 54 degree

14

km/h

Humidity icon

53%

15:00

24

Weather icon

90%

18°

IQAir AirVisual Air Quality Map Wind rotating 40 degree

15

km/h

Humidity icon

60%

16:00

32

Weather icon

90%

17°

IQAir AirVisual Air Quality Map Wind rotating 30 degree

13

km/h

Humidity icon

67%

17:00

32

Weather icon

90%

16°

IQAir AirVisual Air Quality Map Wind rotating 39 degree

10

km/h

Humidity icon

73%

18:00

32

Weather icon

14°

IQAir AirVisual Air Quality Map Wind rotating 36 degree

9

km/h

Humidity icon

83%

19:00

39

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 32 degree

8

km/h

Humidity icon

83%

20:00

39

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 42 degree

7

km/h

Humidity icon

82%

21:00

39

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 37 degree

7

km/h

Humidity icon

84%

22:00

40

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 28 degree

6

km/h

Humidity icon

84%

23:00

40

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 20 degree

5

km/h

Humidity icon

87%

Mon

00:00

40

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 333 degree

3

km/h

Humidity icon

88%

01:00

27

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 35 degree

6

km/h

Humidity icon

92%

02:00

27

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 38 degree

2

km/h

Humidity icon

95%

03:00

27

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 55 degree

2

km/h

Humidity icon

93%

04:00

33

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 240 degree

0

km/h

Humidity icon

92%

05:00

33

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 8 degree

2

km/h

Humidity icon

92%

06:00

33

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 35 degree

3

km/h

Humidity icon

94%

07:00

34

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 103 degree

4

km/h

Humidity icon

91%

08:00

34

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 69 degree

6

km/h

Humidity icon

83%

09:00

34

Weather icon

14°

IQAir AirVisual Air Quality Map Wind rotating 41 degree

6

km/h

Humidity icon

77%

10:00

28

Weather icon

90%

15°

IQAir AirVisual Air Quality Map Wind rotating 39 degree

6

km/h

Humidity icon

71%

11:00

28

Weather icon

90%

16°

IQAir AirVisual Air Quality Map Wind rotating 45 degree

7

km/h

Humidity icon

67%

12:00

28

Weather icon

16°

IQAir AirVisual Air Quality Map Wind rotating 40 degree

8

km/h

Humidity icon

66%

13:00

16

Weather icon

17°

IQAir AirVisual Air Quality Map Wind rotating 35 degree

9

km/h

Humidity icon

64%

14:00

16

Weather icon

90%

16°

IQAir AirVisual Air Quality Map Wind rotating 15 degree

9

km/h

Humidity icon

68%

15:00

16

Weather icon

90%

14°

IQAir AirVisual Air Quality Map Wind rotating 337 degree

7

km/h

Humidity icon

82%

16:00

26

Weather icon

90%

13°

IQAir AirVisual Air Quality Map Wind rotating 349 degree

3

km/h

Humidity icon

93%

17:00

26

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 82 degree

9

km/h

Humidity icon

94%

18:00

26

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 87 degree

10

km/h

Humidity icon

94%

19:00

36

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 78 degree

8

km/h

Humidity icon

95%

20:00

36

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 73 degree

7

km/h

Humidity icon

95%

21:00

36

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 74 degree

6

km/h

Humidity icon

93%

22:00

40

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 62 degree

6

km/h

Humidity icon

93%

23:00

40

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 46 degree

6

km/h

Humidity icon

94%

Tue

00:00

40

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 23 degree

5

km/h

Humidity icon

93%

01:00

43

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 44 degree

3

km/h

Humidity icon

89%

02:00

43

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 48 degree

2

km/h

Humidity icon

85%

03:00

43

Weather icon

9°

IQAir AirVisual Air Quality Map Wind rotating 2 degree

2

km/h

Humidity icon

87%

04:00

52

Weather icon

8°

IQAir AirVisual Air Quality Map Wind rotating 49 degree

1

km/h

Humidity icon

88%

05:00

52

Weather icon

7°

IQAir AirVisual Air Quality Map Wind rotating 237 degree

1

km/h

Humidity icon

90%

06:00

52

Weather icon

7°

IQAir AirVisual Air Quality Map Wind rotating 166 degree

3

km/h

Humidity icon

89%

07:00

51

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 152 degree

4

km/h

Humidity icon

78%

08:00

51

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 56 degree

3

km/h

Humidity icon

67%

09:00

51

Weather icon

14°

IQAir AirVisual Air Quality Map Wind rotating 33 degree

6

km/h

Humidity icon

60%

10:00

44

Weather icon

16°

IQAir AirVisual Air Quality Map Wind rotating 30 degree

9

km/h

Humidity icon

53%

11:00

44

Weather icon

17°

IQAir AirVisual Air Quality Map Wind rotating 29 degree

12

km/h

Humidity icon

48%

12:00

44

Weather icon

18°

IQAir AirVisual Air Quality Map Wind rotating 21 degree

14

km/h

Humidity icon

44%

13:00

36

Weather icon

19°

IQAir AirVisual Air Quality Map Wind rotating 17 degree

14

km/h

Humidity icon

41%

14:00

36

Weather icon

19°

IQAir AirVisual Air Quality Map Wind rotating 1 degree

18

km/h

Humidity icon

41%

Daily forecast

|

San Marcos air quality index (AQI⁺) forecast

Today

44

Weather icon

18°

10°

IQAir AirVisual Air Quality Map Wind rotating 45 degree

13

km/h

Humidity icon

75%

Sun

45

Weather icon

19°

9°

IQAir AirVisual Air Quality Map Wind rotating 45 degree

15

km/h

Humidity icon

72%

Mon

31

Weather icon

17°

10°

IQAir AirVisual Air Quality Map Wind rotating 45 degree

10

km/h

Humidity icon

84%

Air pollutants

What is the current air quality in San Marcos?

IQAir exclamation icon

PM2.5 concentration is currently 1.6 times the World Health Organization annual PM2.5 guideline value.

air quality map

Real-time San Marcos air pollution map

Health recommendations

common.healthRecommendationComp.icons.exerciseAlt

Enjoy outdoor activities

common.healthRecommendationComp.icons.windowAlt

Open your windows to bring clean, fresh air indoors

Get a monitor

Protect yourself from air pollution in San Marcos

SHOP IQAIR PRODUCTS

Air_Monitors_v2_image_728x968px_ee9cbf0e-d125-414e-9f79-215cfaad62c0.jpg

Monitor the air you breathe

Get accurate AirVisual air quality readings and real-time insights for cleaner air. Monitors that reveal pollution sources, highlight when air purifier use is needed.

AirVisual Series

Air_Purifirer_v2_image_728x968px_5720fd5a-7baf-484e-bd44-931e213c7066.jpg

Medical grade air purifiers

Trusted worldwide, the HealthPro Series uses HyperHEPA technology. Filters ultrafine particles other air purifiers miss, delivering medical-grade protection.

HealthPro Series

Atem_Series_v3_image_1250px.jpg

Powerful, stylish air purifiers

Compact and powerful, the Atem Series combines Swiss engineering with high-performance air purification, filtering ultrafine particles with HyperHEPA technology.

Atem Series

Health recommendations

common.healthRecommendationComp.icons.exerciseAlt

Enjoy outdoor activities

common.healthRecommendationComp.icons.windowAlt

Open your windows to bring clean, fresh air indoors

Get a monitor
air quality map

Real-time San Marcos air pollution map

Protect yourself from air pollution in San Marcos

SHOP IQAIR PRODUCTS

Air_Monitors_v2_image_728x968px_ee9cbf0e-d125-414e-9f79-215cfaad62c0.jpg

Monitor the air you breathe

Get accurate AirVisual air quality readings and real-time insights for cleaner air. Monitors that reveal pollution sources, highlight when air purifier use is needed.

AirVisual Series

Air_Purifirer_v2_image_728x968px_5720fd5a-7baf-484e-bd44-931e213c7066.jpg

Medical grade air purifiers

Trusted worldwide, the HealthPro Series uses HyperHEPA technology. Filters ultrafine particles other air purifiers miss, delivering medical-grade protection.

HealthPro Series

Atem_Series_v3_image_1250px.jpg

Powerful, stylish air purifiers

Compact and powerful, the Atem Series combines Swiss engineering with high-performance air purification, filtering ultrafine particles with HyperHEPA technology.

Atem Series

Most polluted locations near San Marcos

Worldwide AQI⁺ rankingArrow icon

City ranking

Real-time Peru AQI⁺ city ranking

#CitiesAQI⁺ US
1
The national flag of Peru

Lima, Lima

56

2
The national flag of Peru

Pucallpa, Ucayali

26

3
The national flag of Peru

La Oroya, Junin

22

History

Historic air quality graph for San Marcos

43 AQI⁺ US
Good
13:00–14:00 May 09 Local time
AQI⁺ US

History

Historic air quality graph for San Marcos

43 AQI⁺ US
Good
13:00–14:00 May 09 Local time
AQI⁺ US

Most polluted locations near San Marcos

Worldwide AQI⁺ rankingArrow icon

City ranking

Real-time Peru AQI⁺ city ranking

#CitiesAQI⁺ US
1
The national flag of Peru

Lima, Lima

56

2
The national flag of Peru

Pucallpa, Ucayali

26

3
The national flag of Peru

La Oroya, Junin

22

Be the first to measure and contribute air quality data to your community

Become a contributor
external link icon

May 9, 2026: Lahore among top 10 most polluted cities in the world

Lava splashing from an active volcano.
external link icon

Volcanic Eruption Map Spotlight: Mount Dukono, North Maluku, Indonesia

external link icon

Wildfire Map Spotlight: Brantley Highway 82 Fire, Georgia

Where is the cleanest air quality in San Marcos?

No locations are available.