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Air quality in San Marcos
Air quality index (AQI) and PM2.5 air pollution in San Marcos
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San Marcos Air Quality Map
Real-time San Marcos air pollution map
AIR QUALITY DATA CONTRIBUTORS
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Pollen
What is the pollen count in San Marcos today?
 | Index | None | |
 | Tree pollen | None | |
 | Grass pollen | None | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather in San Marcos?
| Weather | Mist |
| Temperature | 57.2°F |
| Humidity | 88% |
| Wind | 6.9 mp/h |
| Pressure | 29.9 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Claremont, California | 83 |
| 2 | Redlands, California | 81 |
| 3 | Glendora, California | 80 |
| 4 | San Fernando, California | 79 |
| 5 | Glendale, California | 78 |
| 6 | Pasadena, California | 78 |
| 7 | San Bernardino, California | 78 |
| 8 | Coachella, California | 77 |
| 9 | North Hollywood, California | 77 |
| 10 | Alhambra, California | 75 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
live San Marcos aqi ranking
Real-time San Marcos air quality ranking
| # | station | US AQI |
|---|---|---|
| 1 | Tucana Drive | 36 |
| 2 | CSUSM COMMONS | 34 |
(local time)
SEE WORLD AQI RANKING
US AQI
35
live AQI index
Good
Overview
What is the current air quality in San Marcos?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Good | 35 US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 6.4µg/m³ | |
!
PM2.5
x1.3
PM2.5 concentration in San Marcos is currently 1.3 times the WHO annual air quality guideline value
Health Recommendations
What is the current air quality in San Marcos?
 | Enjoy outdoor activities |
 | Open your windows to bring clean, fresh air indoors GET A MONITOR |
Forecast
San Marcos air quality index (AQI) forecast
| Day | Pollution level | Weather | Temperature | Wind |
|---|---|---|---|---|
| Wednesday, May 29 | Good 34 AQI US |  | 71.6° 53.6° |  8.9 mp/h |
| Thursday, May 30 | Good 39 AQI US |  | 69.8° 53.6° | 8.9 mp/h |
| Friday, May 31 | Good 35 AQI US | | 69.8° 55.4° | 11.2 mp/h |
| Today | Good 35 AQI US | | 69.8° 55.4° | 11.2 mp/h |
| Sunday, Jun 2 | Moderate 59 AQI US  | | 69.8° 53.6° | 11.2 mp/h |
| Monday, Jun 3 | Moderate 56 AQI US | | 69.8° 53.6° | 8.9 mp/h |
| Tuesday, Jun 4 | Moderate 59 AQI US |  | 71.6° 55.4° | 8.9 mp/h |
| Wednesday, Jun 5 | Moderate 70 AQI US | | 71.6° 57.2° | 8.9 mp/h |
| Thursday, Jun 6 | Moderate 75 AQI US | | 73.4° 59° | 8.9 mp/h |
| Friday, Jun 7 | Moderate 75 AQI US | | 73.4° 59° | 8.9 mp/h |
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News
The latest air quality news and resources.
How to best protect from air pollution?
San Marcos air quality data attribution
2Contributors
- 2 Anonymous contributors
2 stations
2 Anonymous Contributors
1 Data source
Data validated and calibrated by IQAirWhere is the cleanest air quality in San Marcos?
AQI US, Metric