Air Quality in San Juan, United States
Windy
25.7°C · 52.0% humidity
25.7°
Feels 25.7°
17
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
AQI Forecast
Calibrated
5
3pm
17
5
5
6pm
5
0
0
9pm
5
0
0
12am
0
0
0
3am
0
0
0
6am
0
0
0
9am
0
0
0
12pm
5
5
Station readings
17
CAMS model
adj -32
37
37
37
37
37
25
25
37
25
25
25
25
25
25
25
25
25
25
25
25
25
25
37
37
PM2.5 Trend (24h)
18h · 1 station52.0%
Humidity
92.6 km/h
Wind SE
1016.8 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
What is the weather forecast for San Juan?
Temperature & Precipitation
PM2.54.1 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
Station readings (1 station within 25 km)
4.1
Median
4.1
Average
4.1
Low
4.1
High
PM2.5 µg/m³ · Model: 7.4 · Bias: +3.3
What is the 7-day forecast for San Juan?
04-09
25.7° 19.5°
04-10
29.1° 19.7°
0.13 mm
04-11
25.7° 20.3°
0.13 mm
04-12
29.7° 20.3°
0.13 mm
04-13
30.2° 21.1°
04-14
32.0° 21.0°
04-15
32.1° 23.2°
Both models agree
Avg diff: 1.2°C
Where are air quality stations near San Juan?
What cities are near San Juan?
Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T18:45 UTC.