Air Quality in San Juan, United States
Drizzle
34.0°C · 41.0% humidity
34.0°
Feels 37.2°
39
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
AQI Forecast
27
5pm
27
27
39
8pm
31
30
29
11pm
28
28
28
2am
27
27
27
5am
27
27
27
8am
27
34
34
11am
34
34
54
2pm
34
34
Air Quality Index Trend
42h · 1 stnSan Juan's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
41.0%
Humidity
119.6 km/h
Wind ESE
1009.4 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
9.4 µg/m³
PM10
27.4 µg/m³
050100150200300500
What is the weather forecast for San Juan?
Temperature & Precipitation
PM2.5 Trend
42h · 1 stationPM2.59.4 µg/m³
✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX0.7
Low
Station readings (1 station within 25 km)
9.4
Median
9.4
Average
9.4
Low
9.4
High
PM2.5 µg/m³ · Model: 8.2 · Bias: -1.2
What is the 7-day forecast for San Juan?
06-09
36.4° 22.1°
0.19 mm
06-10
36.4° 25.5°
06-11
34.8° 25.5°
0.5 mm
06-12
35.6° 24.6°
06-13
34.8° 24.9°
0.13 mm
06-14
36.2° 24.0°
06-15
36.6° 25.6°
Both models agree
Avg diff: 1.5°C
Where are air quality stations near San Juan?
What cities are near San Juan?
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-06-09T01:06 UTC.