WorldArrow icon
Arrow iconSan Marcos

Air quality in San Marcos

Air quality index (AQI⁺) and PM2.5 air pollution in San Marcos • 13 Followers • 10:00, Apr 17 Local time

54*

US AQI⁺

Moderate

face expression based on aqi value

Main pollutant:

PM2.5

10.7 µg/m³

weather condition icon

19°

wind direction icon

7 km/h

weather humid icon

54 %

Hourly forecast

San Marcos air quality index (AQI⁺) forecast

Now

54

Weather icon

19°

IQAir AirVisual Air Quality Map Wind rotating 359 degree

7

km/h

Humidity icon

54%

13:00

54

Weather icon

19°

IQAir AirVisual Air Quality Map Wind rotating 15 degree

10

km/h

Humidity icon

57%

14:00

52

Weather icon

90%

18°

IQAir AirVisual Air Quality Map Wind rotating 19 degree

9

km/h

Humidity icon

61%

15:00

51

Weather icon

90%

17°

IQAir AirVisual Air Quality Map Wind rotating 334 degree

8

km/h

Humidity icon

66%

16:00

49

Weather icon

90%

16°

IQAir AirVisual Air Quality Map Wind rotating 294 degree

7

km/h

Humidity icon

74%

17:00

48

Weather icon

16°

IQAir AirVisual Air Quality Map Wind rotating 272 degree

6

km/h

Humidity icon

78%

18:00

46

Weather icon

15°

IQAir AirVisual Air Quality Map Wind rotating 254 degree

3

km/h

Humidity icon

74%

19:00

44

Weather icon

15°

IQAir AirVisual Air Quality Map Wind rotating 11 degree

1

km/h

Humidity icon

77%

20:00

43

Weather icon

14°

IQAir AirVisual Air Quality Map Wind rotating 353 degree

2

km/h

Humidity icon

80%

21:00

42

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 305 degree

2

km/h

Humidity icon

82%

22:00

41

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 261 degree

3

km/h

Humidity icon

83%

23:00

43

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 239 degree

3

km/h

Humidity icon

83%

Sat

00:00

45

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 219 degree

4

km/h

Humidity icon

82%

01:00

48

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 223 degree

5

km/h

Humidity icon

81%

02:00

47

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 221 degree

7

km/h

Humidity icon

78%

03:00

46

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 233 degree

8

km/h

Humidity icon

79%

04:00

45

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 235 degree

9

km/h

Humidity icon

80%

05:00

48

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 227 degree

10

km/h

Humidity icon

82%

06:00

51

Weather icon

9°

IQAir AirVisual Air Quality Map Wind rotating 219 degree

11

km/h

Humidity icon

84%

07:00

55

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 220 degree

9

km/h

Humidity icon

81%

08:00

53

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 238 degree

7

km/h

Humidity icon

70%

09:00

51

Weather icon

15°

IQAir AirVisual Air Quality Map Wind rotating 270 degree

4

km/h

Humidity icon

61%

10:00

49

Weather icon

17°

IQAir AirVisual Air Quality Map Wind rotating 329 degree

4

km/h

Humidity icon

56%

11:00

47

Weather icon

18°

IQAir AirVisual Air Quality Map Wind rotating 348 degree

7

km/h

Humidity icon

51%

12:00

45

Weather icon

20°

IQAir AirVisual Air Quality Map Wind rotating 346 degree

10

km/h

Humidity icon

47%

13:00

44

Weather icon

20°

IQAir AirVisual Air Quality Map Wind rotating 356 degree

10

km/h

Humidity icon

43%

14:00

42

Weather icon

20°

IQAir AirVisual Air Quality Map Wind rotating 2 degree

12

km/h

Humidity icon

43%

15:00

40

Weather icon

18°

IQAir AirVisual Air Quality Map Wind rotating 345 degree

15

km/h

Humidity icon

53%

16:00

39

Weather icon

90%

17°

IQAir AirVisual Air Quality Map Wind rotating 302 degree

7

km/h

Humidity icon

66%

17:00

40

Weather icon

90%

16°

IQAir AirVisual Air Quality Map Wind rotating 236 degree

7

km/h

Humidity icon

73%

18:00

41

Weather icon

15°

IQAir AirVisual Air Quality Map Wind rotating 229 degree

11

km/h

Humidity icon

79%

19:00

42

Weather icon

14°

IQAir AirVisual Air Quality Map Wind rotating 228 degree

10

km/h

Humidity icon

78%

20:00

42

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 233 degree

9

km/h

Humidity icon

82%

21:00

43

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 257 degree

6

km/h

Humidity icon

84%

22:00

44

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 248 degree

7

km/h

Humidity icon

85%

23:00

45

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 239 degree

7

km/h

Humidity icon

86%

Sun

00:00

46

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 233 degree

8

km/h

Humidity icon

88%

01:00

48

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 226 degree

8

km/h

Humidity icon

88%

02:00

47

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 220 degree

9

km/h

Humidity icon

88%

03:00

47

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 217 degree

9

km/h

Humidity icon

86%

04:00

47

Weather icon

9°

IQAir AirVisual Air Quality Map Wind rotating 218 degree

9

km/h

Humidity icon

82%

05:00

46

Weather icon

9°

IQAir AirVisual Air Quality Map Wind rotating 220 degree

9

km/h

Humidity icon

79%

06:00

45

Weather icon

9°

IQAir AirVisual Air Quality Map Wind rotating 217 degree

9

km/h

Humidity icon

76%

07:00

44

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 218 degree

9

km/h

Humidity icon

70%

08:00

45

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 236 degree

5

km/h

Humidity icon

53%

09:00

46

Weather icon

15°

IQAir AirVisual Air Quality Map Wind rotating 264 degree

3

km/h

Humidity icon

42%

10:00

47

Weather icon

17°

IQAir AirVisual Air Quality Map Wind rotating 336 degree

5

km/h

Humidity icon

38%

11:00

49

Weather icon

18°

IQAir AirVisual Air Quality Map Wind rotating 354 degree

8

km/h

Humidity icon

36%

12:00

51

Weather icon

19°

IQAir AirVisual Air Quality Map Wind rotating 1 degree

10

km/h

Humidity icon

35%

13:00

54

Weather icon

20°

IQAir AirVisual Air Quality Map Wind rotating 2 degree

10

km/h

Humidity icon

35%

14:00

53

Weather icon

21°

IQAir AirVisual Air Quality Map Wind rotating 357 degree

9

km/h

Humidity icon

34%

15:00

53

Weather icon

21°

IQAir AirVisual Air Quality Map Wind rotating 337 degree

12

km/h

Humidity icon

35%

16:00

53

Weather icon

19°

IQAir AirVisual Air Quality Map Wind rotating 327 degree

17

km/h

Humidity icon

42%

17:00

52

Weather icon

18°

IQAir AirVisual Air Quality Map Wind rotating 327 degree

8

km/h

Humidity icon

49%

18:00

51

Weather icon

15°

IQAir AirVisual Air Quality Map Wind rotating 257 degree

3

km/h

Humidity icon

64%

19:00

51

Weather icon

14°

IQAir AirVisual Air Quality Map Wind rotating 242 degree

7

km/h

Humidity icon

74%

20:00

51

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 245 degree

10

km/h

Humidity icon

77%

21:00

51

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 235 degree

11

km/h

Humidity icon

81%

22:00

52

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 232 degree

10

km/h

Humidity icon

85%

23:00

52

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 225 degree

10

km/h

Humidity icon

86%

Mon

00:00

52

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 221 degree

9

km/h

Humidity icon

82%

01:00

52

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 222 degree

10

km/h

Humidity icon

78%

02:00

52

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 223 degree

10

km/h

Humidity icon

75%

03:00

52

Weather icon

9°

IQAir AirVisual Air Quality Map Wind rotating 224 degree

10

km/h

Humidity icon

74%

04:00

52

Weather icon

9°

IQAir AirVisual Air Quality Map Wind rotating 222 degree

10

km/h

Humidity icon

73%

05:00

51

Weather icon

8°

IQAir AirVisual Air Quality Map Wind rotating 221 degree

10

km/h

Humidity icon

71%

06:00

51

Weather icon

8°

IQAir AirVisual Air Quality Map Wind rotating 223 degree

10

km/h

Humidity icon

68%

07:00

51

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 218 degree

10

km/h

Humidity icon

63%

08:00

51

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 231 degree

7

km/h

Humidity icon

49%

09:00

51

Weather icon

15°

IQAir AirVisual Air Quality Map Wind rotating 260 degree

5

km/h

Humidity icon

42%

10:00

51

Weather icon

17°

IQAir AirVisual Air Quality Map Wind rotating 296 degree

5

km/h

Humidity icon

38%

11:00

50

Weather icon

18°

IQAir AirVisual Air Quality Map Wind rotating 319 degree

7

km/h

Humidity icon

35%

Daily forecast

|

San Marcos air quality index (AQI⁺) forecast

Today

53

Weather icon

19°

11°

IQAir AirVisual Air Quality Map Wind rotating 0 degree

10

km/h

Humidity icon

73%

Sat

46

Weather icon

20°

9°

IQAir AirVisual Air Quality Map Wind rotating 225 degree

15

km/h

Humidity icon

67%

Sun

48

Weather icon

21°

9°

IQAir AirVisual Air Quality Map Wind rotating 225 degree

17

km/h

Humidity icon

54%

Air pollutants

What is the current air quality in San Marcos?

IQAir exclamation icon

PM2.5 concentration is currently 2.1 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

Sensitive groups should reduce outdoor exercise

common.healthRecommendationComp.icons.windowAlt

Close your windows to avoid dirty outdoor air

Get a monitor
common.healthRecommendationComp.icons.maskAlt

Sensitive groups should wear a mask outdoors

Get a mask
common.healthRecommendationComp.icons.airPurifierAlt

Sensitive groups should run an air purifier

Get an air purifier

Protect yourself from air pollution in San Marcos

SHOP IQAIR PRODUCTS

Air Purifiers

Face Masks

Air Quality Monitors

Health recommendations

common.healthRecommendationComp.icons.exerciseAlt

Sensitive groups should reduce outdoor exercise

common.healthRecommendationComp.icons.windowAlt

Close your windows to avoid dirty outdoor air

Get a monitor
common.healthRecommendationComp.icons.maskAlt

Sensitive groups should wear a mask outdoors

Get a mask
common.healthRecommendationComp.icons.airPurifierAlt

Sensitive groups should run an air purifier

Get an air purifier
air quality map

Real-time San Marcos air pollution map

Protect yourself from air pollution in San Marcos

SHOP IQAIR PRODUCTS

Air Purifiers

Face Masks

Air Quality Monitors

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

63

2
The national flag of Peru

La Oroya, Junin

46

3
The national flag of Peru

Pucallpa, Ucayali

32

History

Historic air quality graph for San Marcos

54 AQI⁺ US
Moderate
10:00–11:00 Apr 17 Local time
AQI⁺ US

History

Historic air quality graph for San Marcos

54 AQI⁺ US
Moderate
10:00–11:00 Apr 17 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

63

2
The national flag of Peru

La Oroya, Junin

46

3
The national flag of Peru

Pucallpa, Ucayali

32

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

Become a contributor
external link icon

Southeast Asia Air Quality Alert

Polluted skies over Cairo
external link icon

April 17, 2026: Cairo among top 10 most polluted cities in the world

Forest wrapped in a haze of smoke
external link icon

Wildfire Map Spotlight: Smoke Show Fire, Mississippi

Where is the cleanest air quality in San Marcos?

No locations are available.