Air Quality in San Juan, United States
Windy
24.8°C · 53.0% humidity
24.8°
Feels 24.8°
14
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
AQI Forecast
Calibrated
14
8pm
12
24
12
11pm
12
12
12
2am
12
12
12
5am
12
12
12
8am
12
12
12
11am
12
24
24
2pm
24
12
12
5pm
12
24
Station readings
14
CAMS model
adj -13
25
25
37
25
25
25
25
25
25
25
25
25
25
25
25
25
25
37
37
37
25
25
25
37
PM2.5 Trend (24h)
17h · 1 station53.0%
Humidity
86.8 km/h
Wind SE
1014.8 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
What is the weather forecast for San Juan?
Temperature & Precipitation
PM2.53.3 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
Station readings (1 station within 25 km)
3.3
Median
3.3
Average
3.3
Low
3.3
High
PM2.5 µg/m³ · Model: 7.4 · Bias: +4.1
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: 1.3°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 2026-04-09T23:15 UTC.