San Juan

San Juan, Puerto Rico

Updated: Jan 30, 2026, 1:00 PM

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Data unavailable

Current Weather

28.1°C

Temperature

59%

Humidity

9.9

mph wind

Partly cloudy

Conditions

Pollutant Breakdown

PM2.5

µg/m³ · Fine particles

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PM10

µg/m³ · Coarse particles

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Ozone

ppb · Ground-level ozone

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NO₂

ppb · Nitrogen dioxide

—

SO₂

ppb · Sulfur dioxide

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ppm · Carbon monoxide

PM2.5 Forecast (next 7 days)

Wed

1/28

avg

Thu

1/29

avg

Fri

1/30

avg

Sat

1/31

avg

Sun

2/1

avg

Mon

2/2

avg

Tue

2/3

avg

Data from: Junta de Calidad Ambiental (JCA) de Puerto Rico, Air Now - US EPA, World Air Quality Index Project

Is the air safe in San Juan today?

Real-time air quality data for San Juan is currently unavailable. Please check back shortly.

The AQI scale runs from 0 to 500. Values of 0–50 are Good, 51–100 are Moderate, 101–150 are Unhealthy for Sensitive Groups, 151–200 are Unhealthy, 201–300 are Very Unhealthy, and 301–500 are Hazardous.

Air quality in San Juan, Puerto Rico is monitored by local environmental agencies and reported through the World Air Quality Index project. Data is updated hourly and includes PM2.5, PM10, ozone, nitrogen dioxide, sulfur dioxide, and carbon monoxide.

AQI Scale Reference

0–50

Good

51–100

Moderate

101–150

Unhealthy for Sensitive Groups

151–200

Unhealthy

201–300

Very Unhealthy

301+

Hazardous