San Juan Air Pollution: Real-time Air Quality Index (AQI)

San Juan
Bayamon
Ponce
St De Baie Mahault, Guadeloupe
St Industrielle, Guadeloupe
Saint-pierre, Cdst, Martinique
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San Juan AQI: San Juan Real-time Air Quality Index (AQI).
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no data
Updated on Wed. 21:00
temperature: -°C
currentpast 2 daysminmax
PM2.5 AQI
102San Juan, Puerto Rico PM25 (fine particulate matter) measured by : • Junta de Calidad Ambiental (JCA) de Puerto Rico • Air Now - US EPA. Values are converted to the US EPA AQI standard.17102
Weather Information
Temp.
30San Juan, Puerto Rico t (temp.) measured by Citizen Weather Observer Program (CWOP/APRS).2832
Pressure
1016San Juan, Puerto Rico p (pressure:) measured by Citizen Weather Observer Program (CWOP/APRS).10161020
Humidity
78San Juan, Puerto Rico h (humidity) measured by Citizen Weather Observer Program (CWOP/APRS).7186
Wind
4San Juan, Puerto Rico w (wind) measured by Citizen Weather Observer Program (CWOP/APRS).15
Marker
map © OpenStreetMap contributors

Air Quality Forecast
WED 13
31°C
26°C
THU 14
31°C
26°C
FRI 15
30°C
25°C
SAT 16
29°C
25°C
SUN 17
32°C
25°C
MON 18
32°C
26°C
PM2.5
Wednesday 13Thursday 14Friday 15Saturday 16Sunday 17Monday 18
hour
0369121518210369121518210369121518210369121518210369121518210369121518
Wind Speed (m/s)
43348866456799655447875321122233433344542423664















































Temp.
26°26°26°30°31°30°28°27°27°26°27°30°31°30°28°26°26°25°26°30°30°30°28°27°26°26°26°28°28°25°25°25°25°25°25°30°31°28°27°26°26°26°27°30°32°30°28°
relative humidity
8889876966667580828380675854618082848165666370757981807172899087888782596373697980827662536272
barometric pressure
10151015101610171015101410151016101510141015101610151014101510171016101510161016101510141014101510131012101210121011100910101011101010091009101010091009101110121011101210141014101310141015
total precipitation
0.60.30.40.10.10.10.10.30.70.10.30.10.10.31.10.40.50.10.30.10.10.31.43.60.60.91.62.40.10.10.92.93.30.10.10.10.1
UVI:
11


6:06 ~ 18:54
UVI:
10


6:07 ~ 18:54
UVI:
11


6:07 ~ 18:53
UVI:
8


6:07 ~ 18:53
UVI:
4


6:08 ~ 18:52
UVI:
1


6:08 ~ 18:51
Forecast plotted using timezone -04:00
Latest forecast updates:
Wind: a day ago [Aug 13, 2025 4:44 AM]
fine particulate matter: 12 hours ago [Aug 13, 2025 2:15 PM]
click to view the detailed forecast

Air Quality Data provided by: the Junta de Calidad Ambiental (JCA) de Puerto Rico (jca.pr.gov) and Air Now - US EPA (airnow.gov)

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About the Air Quality and Pollution Measurement:

About the Air Quality Levels

AQIAir Pollution LevelHealth ImplicationsCautionary Statement (for PM2.5)
0 - 50GoodAir quality is considered satisfactory, and air pollution poses little or no riskNone
51 -100ModerateAir quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
101-150Unhealthy for Sensitive GroupsMembers of sensitive groups may experience health effects. The general public is not likely to be affected.Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
151-200UnhealthyEveryone may begin to experience health effects; members of sensitive groups may experience more serious health effectsActive children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion
201-300Very UnhealthyHealth warnings of emergency conditions. The entire population is more likely to be affected.Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.
300+HazardousHealth alert: everyone may experience more serious health effectsEveryone should avoid all outdoor exertion

To know more about Air Quality and Pollution, check the wikipedia Air Quality topic or the airnow guide to Air Quality and Your Health.

For very useful health advices of Beijing Doctor Richard Saint Cyr MD, check www.myhealthbeijing.com blog.


Usage Notice: All the Air Quality data are unvalidated at the time of publication, and due to quality assurance these data may be amended, without notice, at any time. The World Air Quality Index project has exercised all reasonable skill and care in compiling the contents of this information and under no circumstances will the World Air Quality Index project team or its agents be liable in contract, tort or otherwise for any loss, injury or damage arising directly or indirectly from the supply of this data.



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